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Finding the Fourth Proportional to 391,060.32, 539,663.24 and 212,212.32

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Solution

The fourth proportional to 391,060.32, 539,663.24 and 212,212.32 is: 292,853.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,060.32 : 539,663.24 = 212,212.32 : x
  2. Step 2: Convert to fraction form
    391,060.32/539,663.24 = 212,212.32/x
  3. Step 3: Cross multiply
    391,060.32x = 539,663.24 × 212,212.32
  4. Step 4: Simplify right side
    391,060.32x = 114,523,187,118.06
  5. Step 5: Solve for x
    x = 114,523,187,118.06/391,060.32
  6. Step 6: Final answer
    x = 292,853.00

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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.