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Finding the Fourth Proportional to 391,085.52, 539,697.96 and 212,237.52

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Solution

The fourth proportional to 391,085.52, 539,697.96 and 212,237.52 is: 292,887.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,085.52 : 539,697.96 = 212,237.52 : x
  2. Step 2: Convert to fraction form
    391,085.52/539,697.96 = 212,237.52/x
  3. Step 3: Cross multiply
    391,085.52x = 539,697.96 × 212,237.52
  4. Step 4: Simplify right side
    391,085.52x = 114,544,156,579.46
  5. Step 5: Solve for x
    x = 114,544,156,579.46/391,085.52
  6. Step 6: Final answer
    x = 292,887.75

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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.