Home / 658,890.10-988,335.15-392,950.90

Finding the Fourth Proportional to 658,890.10, 988,335.15 and 392,950.90

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Solution

The fourth proportional to 658,890.10, 988,335.15 and 392,950.90 is: 589,426.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,890.10 : 988,335.15 = 392,950.90 : x
  2. Step 2: Convert to fraction form
    658,890.10/988,335.15 = 392,950.90/x
  3. Step 3: Cross multiply
    658,890.10x = 988,335.15 × 392,950.90
  4. Step 4: Simplify right side
    658,890.10x = 388,367,186,694.14
  5. Step 5: Solve for x
    x = 388,367,186,694.14/658,890.10
  6. Step 6: Final answer
    x = 589,426.35

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.