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Finding the Fourth Proportional to 391,052.76, 539,652.80 and 212,204.76

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Solution

The fourth proportional to 391,052.76, 539,652.80 and 212,204.76 is: 292,842.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,052.76 : 539,652.80 = 212,204.76 : x
  2. Step 2: Convert to fraction form
    391,052.76/539,652.80 = 212,204.76/x
  3. Step 3: Cross multiply
    391,052.76x = 539,652.80 × 212,204.76
  4. Step 4: Simplify right side
    391,052.76x = 114,516,892,907.33
  5. Step 5: Solve for x
    x = 114,516,892,907.33/391,052.76
  6. Step 6: Final answer
    x = 292,842.56

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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.