Home / 717,072.08-989,551.50-394,775.52

Finding the Fourth Proportional to 717,072.08, 989,551.50 and 394,775.52

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Solution

The fourth proportional to 717,072.08, 989,551.50 and 394,775.52 is: 544,785.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,072.08 : 989,551.50 = 394,775.52 : x
  2. Step 2: Convert to fraction form
    717,072.08/989,551.50 = 394,775.52/x
  3. Step 3: Cross multiply
    717,072.08x = 989,551.50 × 394,775.52
  4. Step 4: Simplify right side
    717,072.08x = 390,650,707,979.28
  5. Step 5: Solve for x
    x = 390,650,707,979.28/717,072.08
  6. Step 6: Final answer
    x = 544,785.83

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Half scale
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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.