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Finding the Fourth Proportional to 714,225.84, 985,646.52 and 391,917.12

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Solution

The fourth proportional to 714,225.84, 985,646.52 and 391,917.12 is: 540,853.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,225.84 : 985,646.52 = 391,917.12 : x
  2. Step 2: Convert to fraction form
    714,225.84/985,646.52 = 391,917.12/x
  3. Step 3: Cross multiply
    714,225.84x = 985,646.52 × 391,917.12
  4. Step 4: Simplify right side
    714,225.84x = 386,291,745,456.42
  5. Step 5: Solve for x
    x = 386,291,745,456.42/714,225.84
  6. Step 6: Final answer
    x = 540,853.78

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Double scale
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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.