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Finding the Fourth Proportional to 717,516.04, 990,173.28 and 395,227.30

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Solution

The fourth proportional to 717,516.04, 990,173.28 and 395,227.30 is: 545,414.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,516.04 : 990,173.28 = 395,227.30 : x
  2. Step 2: Convert to fraction form
    717,516.04/990,173.28 = 395,227.30/x
  3. Step 3: Cross multiply
    717,516.04x = 990,173.28 × 395,227.30
  4. Step 4: Simplify right side
    717,516.04x = 391,343,511,986.54
  5. Step 5: Solve for x
    x = 391,343,511,986.54/717,516.04
  6. Step 6: Final answer
    x = 545,414.30

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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.