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Finding the Fourth Proportional to 426,258.73, 639,490.27 and 141,951.74

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Solution

The fourth proportional to 426,258.73, 639,490.27 and 141,951.74 is: 212,961.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,258.73 : 639,490.27 = 141,951.74 : x
  2. Step 2: Convert to fraction form
    426,258.73/639,490.27 = 141,951.74/x
  3. Step 3: Cross multiply
    426,258.73x = 639,490.27 × 141,951.74
  4. Step 4: Simplify right side
    426,258.73x = 90,776,758,493.17
  5. Step 5: Solve for x
    x = 90,776,758,493.17/426,258.73
  6. Step 6: Final answer
    x = 212,961.64

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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.