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Finding the Fourth Proportional to 717,391.80, 990,045.45 and 395,101.82

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Solution

The fourth proportional to 717,391.80, 990,045.45 and 395,101.82 is: 545,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,391.80 : 990,045.45 = 395,101.82 : x
  2. Step 2: Convert to fraction form
    717,391.80/990,045.45 = 395,101.82/x
  3. Step 3: Cross multiply
    717,391.80x = 990,045.45 × 395,101.82
  4. Step 4: Simplify right side
    717,391.80x = 391,168,754,227.49
  5. Step 5: Solve for x
    x = 391,168,754,227.49/717,391.80
  6. Step 6: Final answer
    x = 545,265.16

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Similar ratio
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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.