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Finding the Fourth Proportional to 703,998.52, 971,512.05 and 398,134.96

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Solution

The fourth proportional to 703,998.52, 971,512.05 and 398,134.96 is: 549,422.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,998.52 : 971,512.05 = 398,134.96 : x
  2. Step 2: Convert to fraction form
    703,998.52/971,512.05 = 398,134.96/x
  3. Step 3: Cross multiply
    703,998.52x = 971,512.05 × 398,134.96
  4. Step 4: Simplify right side
    703,998.52x = 386,792,911,166.27
  5. Step 5: Solve for x
    x = 386,792,911,166.27/703,998.52
  6. Step 6: Final answer
    x = 549,422.90

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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.