Home / 718,442.49-991,429.38-396,152.49

Finding the Fourth Proportional to 718,442.49, 991,429.38 and 396,152.49

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Solution

The fourth proportional to 718,442.49, 991,429.38 and 396,152.49 is: 546,678.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,442.49 : 991,429.38 = 396,152.49 : x
  2. Step 2: Convert to fraction form
    718,442.49/991,429.38 = 396,152.49/x
  3. Step 3: Cross multiply
    718,442.49x = 991,429.38 × 396,152.49
  4. Step 4: Simplify right side
    718,442.49x = 392,757,217,546.16
  5. Step 5: Solve for x
    x = 392,757,217,546.16/718,442.49
  6. Step 6: Final answer
    x = 546,678.72

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Double scale
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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.