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Finding the Fourth Proportional to 698,372.55, 963,682.31 and 392,400.32

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Solution

The fourth proportional to 698,372.55, 963,682.31 and 392,400.32 is: 541,472.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,372.55 : 963,682.31 = 392,400.32 : x
  2. Step 2: Convert to fraction form
    698,372.55/963,682.31 = 392,400.32/x
  3. Step 3: Cross multiply
    698,372.55x = 963,682.31 × 392,400.32
  4. Step 4: Simplify right side
    698,372.55x = 378,149,242,984.93
  5. Step 5: Solve for x
    x = 378,149,242,984.93/698,372.55
  6. Step 6: Final answer
    x = 541,472.09

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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.