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Finding the Fourth Proportional to 717,943.80, 990,760.14 and 395,653.80

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Solution

The fourth proportional to 717,943.80, 990,760.14 and 395,653.80 is: 546,000.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,943.80 : 990,760.14 = 395,653.80 : x
  2. Step 2: Convert to fraction form
    717,943.80/990,760.14 = 395,653.80/x
  3. Step 3: Cross multiply
    717,943.80x = 990,760.14 × 395,653.80
  4. Step 4: Simplify right side
    717,943.80x = 391,998,014,279.53
  5. Step 5: Solve for x
    x = 391,998,014,279.53/717,943.80
  6. Step 6: Final answer
    x = 546,000.97

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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.