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Finding the Fourth Proportional to 426,103.20, 639,154.80 and 159,872.40

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Solution

The fourth proportional to 426,103.20, 639,154.80 and 159,872.40 is: 239,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,103.20 : 639,154.80 = 159,872.40 : x
  2. Step 2: Convert to fraction form
    426,103.20/639,154.80 = 159,872.40/x
  3. Step 3: Cross multiply
    426,103.20x = 639,154.80 × 159,872.40
  4. Step 4: Simplify right side
    426,103.20x = 102,183,211,847.52
  5. Step 5: Solve for x
    x = 102,183,211,847.52/426,103.20
  6. Step 6: Final answer
    x = 239,808.60

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1.5x scale

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.