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Finding the Fourth Proportional to 504,871.31, 696,711.20 and 278,516.75

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Solution

The fourth proportional to 504,871.31, 696,711.20 and 278,516.75 is: 384,346.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    504,871.31 : 696,711.20 = 278,516.75 : x
  2. Step 2: Convert to fraction form
    504,871.31/696,711.20 = 278,516.75/x
  3. Step 3: Cross multiply
    504,871.31x = 696,711.20 × 278,516.75
  4. Step 4: Simplify right side
    504,871.31x = 194,045,737,720.02
  5. Step 5: Solve for x
    x = 194,045,737,720.02/504,871.31
  6. Step 6: Final answer
    x = 384,346.93

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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.