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Finding the Fourth Proportional to 610,415,987.20, 915,623,980.80 and 586,607,430.40

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Solution

The fourth proportional to 610,415,987.20, 915,623,980.80 and 586,607,430.40 is: 879,911,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,415,987.20 : 915,623,980.80 = 586,607,430.40 : x
  2. Step 2: Convert to fraction form
    610,415,987.20/915,623,980.80 = 586,607,430.40/x
  3. Step 3: Cross multiply
    610,415,987.20x = 915,623,980.80 × 586,607,430.40
  4. Step 4: Simplify right side
    610,415,987.20x = 537,111,830,589,706,880
  5. Step 5: Solve for x
    x = 537,111,830,589,706,880/610,415,987.20
  6. Step 6: Final answer
    x = 879,911,145.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.