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Finding the Fourth Proportional to 426,654.46, 640,026.68 and 142,245.88

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Solution

The fourth proportional to 426,654.46, 640,026.68 and 142,245.88 is: 213,383.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,654.46 : 640,026.68 = 142,245.88 : x
  2. Step 2: Convert to fraction form
    426,654.46/640,026.68 = 142,245.88/x
  3. Step 3: Cross multiply
    426,654.46x = 640,026.68 × 142,245.88
  4. Step 4: Simplify right side
    426,654.46x = 91,041,158,320.08
  5. Step 5: Solve for x
    x = 91,041,158,320.08/426,654.46
  6. Step 6: Final answer
    x = 213,383.82

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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.