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Finding the Fourth Proportional to 585,613.80, 878,420.70 and 491,135.40

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Solution

The fourth proportional to 585,613.80, 878,420.70 and 491,135.40 is: 736,703.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,613.80 : 878,420.70 = 491,135.40 : x
  2. Step 2: Convert to fraction form
    585,613.80/878,420.70 = 491,135.40/x
  3. Step 3: Cross multiply
    585,613.80x = 878,420.70 × 491,135.40
  4. Step 4: Simplify right side
    585,613.80x = 431,423,501,862.78
  5. Step 5: Solve for x
    x = 431,423,501,862.78/585,613.80
  6. Step 6: Final answer
    x = 736,703.10

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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.