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Finding the Fourth Proportional to 426,155.80, 639,233.70 and 267,525.40

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Solution

The fourth proportional to 426,155.80, 639,233.70 and 267,525.40 is: 401,288.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,155.80 : 639,233.70 = 267,525.40 : x
  2. Step 2: Convert to fraction form
    426,155.80/639,233.70 = 267,525.40/x
  3. Step 3: Cross multiply
    426,155.80x = 639,233.70 × 267,525.40
  4. Step 4: Simplify right side
    426,155.80x = 171,011,251,285.98
  5. Step 5: Solve for x
    x = 171,011,251,285.98/426,155.80
  6. Step 6: Final answer
    x = 401,288.10

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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.