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Finding the Fourth Proportional to 698,379.22, 963,691.40 and 392,406.94

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Solution

The fourth proportional to 698,379.22, 963,691.40 and 392,406.94 is: 541,481.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,379.22 : 963,691.40 = 392,406.94 : x
  2. Step 2: Convert to fraction form
    698,379.22/963,691.40 = 392,406.94/x
  3. Step 3: Cross multiply
    698,379.22x = 963,691.40 × 392,406.94
  4. Step 4: Simplify right side
    698,379.22x = 378,159,193,378.32
  5. Step 5: Solve for x
    x = 378,159,193,378.32/698,379.22
  6. Step 6: Final answer
    x = 541,481.16

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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.