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Finding the Fourth Proportional to 426,383.80, 639,458.70 and 160,124.20

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Solution

The fourth proportional to 426,383.80, 639,458.70 and 160,124.20 is: 240,142.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,383.80 : 639,458.70 = 160,124.20 : x
  2. Step 2: Convert to fraction form
    426,383.80/639,458.70 = 160,124.20/x
  3. Step 3: Cross multiply
    426,383.80x = 639,458.70 × 160,124.20
  4. Step 4: Simplify right side
    426,383.80x = 102,392,812,770.54
  5. Step 5: Solve for x
    x = 102,392,812,770.54/426,383.80
  6. Step 6: Final answer
    x = 240,142.36

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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.