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Finding the Fourth Proportional to 585,612.80, 878,419.20 and 491,134.40

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Solution

The fourth proportional to 585,612.80, 878,419.20 and 491,134.40 is: 736,701.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,612.80 : 878,419.20 = 491,134.40 : x
  2. Step 2: Convert to fraction form
    585,612.80/878,419.20 = 491,134.40/x
  3. Step 3: Cross multiply
    585,612.80x = 878,419.20 × 491,134.40
  4. Step 4: Simplify right side
    585,612.80x = 431,421,886,740.48
  5. Step 5: Solve for x
    x = 431,421,886,740.48/585,612.80
  6. Step 6: Final answer
    x = 736,701.60

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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.