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Finding the Fourth Proportional to 698,370.72, 963,679.68 and 392,398.44

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Solution

The fourth proportional to 698,370.72, 963,679.68 and 392,398.44 is: 541,469.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,370.72 : 963,679.68 = 392,398.44 : x
  2. Step 2: Convert to fraction form
    698,370.72/963,679.68 = 392,398.44/x
  3. Step 3: Cross multiply
    698,370.72x = 963,679.68 × 392,398.44
  4. Step 4: Simplify right side
    698,370.72x = 378,146,403,091.70
  5. Step 5: Solve for x
    x = 378,146,403,091.70/698,370.72
  6. Step 6: Final answer
    x = 541,469.44

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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.