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Finding the Fourth Proportional to 659,598.30, 989,397.45 and 210,315.60

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Solution

The fourth proportional to 659,598.30, 989,397.45 and 210,315.60 is: 315,473.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,598.30 : 989,397.45 = 210,315.60 : x
  2. Step 2: Convert to fraction form
    659,598.30/989,397.45 = 210,315.60/x
  3. Step 3: Cross multiply
    659,598.30x = 989,397.45 × 210,315.60
  4. Step 4: Simplify right side
    659,598.30x = 208,085,718,335.22
  5. Step 5: Solve for x
    x = 208,085,718,335.22/659,598.30
  6. Step 6: Final answer
    x = 315,473.40

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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.