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Finding the Fourth Proportional to 717,953.52, 990,757.61 and 391,274.94

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Solution

The fourth proportional to 717,953.52, 990,757.61 and 391,274.94 is: 539,949.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,953.52 : 990,757.61 = 391,274.94 : x
  2. Step 2: Convert to fraction form
    717,953.52/990,757.61 = 391,274.94/x
  3. Step 3: Cross multiply
    717,953.52x = 990,757.61 × 391,274.94
  4. Step 4: Simplify right side
    717,953.52x = 387,658,619,145.32
  5. Step 5: Solve for x
    x = 387,658,619,145.32/717,953.52
  6. Step 6: Final answer
    x = 539,949.46

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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.