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Finding the Fourth Proportional to 717,518.04, 990,176.04 and 395,229.30

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Solution

The fourth proportional to 717,518.04, 990,176.04 and 395,229.30 is: 545,417.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,518.04 : 990,176.04 = 395,229.30 : x
  2. Step 2: Convert to fraction form
    717,518.04/990,176.04 = 395,229.30/x
  3. Step 3: Cross multiply
    717,518.04x = 990,176.04 × 395,229.30
  4. Step 4: Simplify right side
    717,518.04x = 391,346,583,165.97
  5. Step 5: Solve for x
    x = 391,346,583,165.97/717,518.04
  6. Step 6: Final answer
    x = 545,417.06

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Double scale
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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.