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Finding the Fourth Proportional to 425,387.40, 587,031.81 and 234,400.84

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Solution

The fourth proportional to 425,387.40, 587,031.81 and 234,400.84 is: 323,471.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,387.40 : 587,031.81 = 234,400.84 : x
  2. Step 2: Convert to fraction form
    425,387.40/587,031.81 = 234,400.84/x
  3. Step 3: Cross multiply
    425,387.40x = 587,031.81 × 234,400.84
  4. Step 4: Simplify right side
    425,387.40x = 137,600,747,024.14
  5. Step 5: Solve for x
    x = 137,600,747,024.14/425,387.40
  6. Step 6: Final answer
    x = 323,471.61

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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.