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Finding the Fourth Proportional to 391,034.84, 539,889.30 and 263,663.96

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Solution

The fourth proportional to 391,034.84, 539,889.30 and 263,663.96 is: 364,032.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,034.84 : 539,889.30 = 263,663.96 : x
  2. Step 2: Convert to fraction form
    391,034.84/539,889.30 = 263,663.96/x
  3. Step 3: Cross multiply
    391,034.84x = 539,889.30 × 263,663.96
  4. Step 4: Simplify right side
    391,034.84x = 142,349,350,799.63
  5. Step 5: Solve for x
    x = 142,349,350,799.63/391,034.84
  6. Step 6: Final answer
    x = 364,032.40

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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.