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Finding the Fourth Proportional to 426,484.74, 639,901.12 and 274,761.12

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Solution

The fourth proportional to 426,484.74, 639,901.12 and 274,761.12 is: 412,253.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,484.74 : 639,901.12 = 274,761.12 : x
  2. Step 2: Convert to fraction form
    426,484.74/639,901.12 = 274,761.12/x
  3. Step 3: Cross multiply
    426,484.74x = 639,901.12 × 274,761.12
  4. Step 4: Simplify right side
    426,484.74x = 175,819,948,420.45
  5. Step 5: Solve for x
    x = 175,819,948,420.45/426,484.74
  6. Step 6: Final answer
    x = 412,253.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.