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Finding the Fourth Proportional to 717,902.55, 990,703.45 and 395,612.55

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Solution

The fourth proportional to 717,902.55, 990,703.45 and 395,612.55 is: 545,944.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,902.55 : 990,703.45 = 395,612.55 : x
  2. Step 2: Convert to fraction form
    717,902.55/990,703.45 = 395,612.55/x
  3. Step 3: Cross multiply
    717,902.55x = 990,703.45 × 395,612.55
  4. Step 4: Simplify right side
    717,902.55x = 391,934,718,148.30
  5. Step 5: Solve for x
    x = 391,934,718,148.30/717,902.55
  6. Step 6: Final answer
    x = 545,944.18

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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.