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Finding the Fourth Proportional to 426,155.60, 639,233.40 and 239,142.80

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Solution

The fourth proportional to 426,155.60, 639,233.40 and 239,142.80 is: 358,714.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,155.60 : 639,233.40 = 239,142.80 : x
  2. Step 2: Convert to fraction form
    426,155.60/639,233.40 = 239,142.80/x
  3. Step 3: Cross multiply
    426,155.60x = 639,233.40 × 239,142.80
  4. Step 4: Simplify right side
    426,155.60x = 152,868,065,129.52
  5. Step 5: Solve for x
    x = 152,868,065,129.52/426,155.60
  6. Step 6: Final answer
    x = 358,714.20

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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.