Home / 687,708.60-1,031,562.90-214,390.20

Finding the Fourth Proportional to 687,708.60, 1,031,562.90 and 214,390.20

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Solution

The fourth proportional to 687,708.60, 1,031,562.90 and 214,390.20 is: 321,585.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,708.60 : 1,031,562.90 = 214,390.20 : x
  2. Step 2: Convert to fraction form
    687,708.60/1,031,562.90 = 214,390.20/x
  3. Step 3: Cross multiply
    687,708.60x = 1,031,562.90 × 214,390.20
  4. Step 4: Simplify right side
    687,708.60x = 221,156,976,443.58
  5. Step 5: Solve for x
    x = 221,156,976,443.58/687,708.60
  6. Step 6: Final answer
    x = 321,585.30

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Similar ratio
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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.