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Finding the Fourth Proportional to 478,986.18, 660,996.07 and 261,194.30

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Solution

The fourth proportional to 478,986.18, 660,996.07 and 261,194.30 is: 360,445.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,986.18 : 660,996.07 = 261,194.30 : x
  2. Step 2: Convert to fraction form
    478,986.18/660,996.07 = 261,194.30/x
  3. Step 3: Cross multiply
    478,986.18x = 660,996.07 × 261,194.30
  4. Step 4: Simplify right side
    478,986.18x = 172,648,405,806.40
  5. Step 5: Solve for x
    x = 172,648,405,806.40/478,986.18
  6. Step 6: Final answer
    x = 360,445.48

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.