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Finding the Fourth Proportional to 426,258.48, 639,489.90 and 141,951.49

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Solution

The fourth proportional to 426,258.48, 639,489.90 and 141,951.49 is: 212,961.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,258.48 : 639,489.90 = 141,951.49 : x
  2. Step 2: Convert to fraction form
    426,258.48/639,489.90 = 141,951.49/x
  3. Step 3: Cross multiply
    426,258.48x = 639,489.90 × 141,951.49
  4. Step 4: Simplify right side
    426,258.48x = 90,776,544,977.92
  5. Step 5: Solve for x
    x = 90,776,544,977.92/426,258.48
  6. Step 6: Final answer
    x = 212,961.26

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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.