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Finding the Fourth Proportional to 391,032, 539,624.52 and 212,184

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Solution

The fourth proportional to 391,032, 539,624.52 and 212,184 is: 292,814.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,032 : 539,624.52 = 212,184 : x
  2. Step 2: Convert to fraction form
    391,032/539,624.52 = 212,184/x
  3. Step 3: Cross multiply
    391,032x = 539,624.52 × 212,184
  4. Step 4: Simplify right side
    391,032x = 114,499,689,151.68
  5. Step 5: Solve for x
    x = 114,499,689,151.68/391,032
  6. Step 6: Final answer
    x = 292,814.12

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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.