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Finding the Fourth Proportional to 409,708.20, 614,562.30 and 251,423.40

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Solution

The fourth proportional to 409,708.20, 614,562.30 and 251,423.40 is: 377,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,708.20 : 614,562.30 = 251,423.40 : x
  2. Step 2: Convert to fraction form
    409,708.20/614,562.30 = 251,423.40/x
  3. Step 3: Cross multiply
    409,708.20x = 614,562.30 × 251,423.40
  4. Step 4: Simplify right side
    409,708.20x = 154,515,342,977.82
  5. Step 5: Solve for x
    x = 154,515,342,977.82/409,708.20
  6. Step 6: Final answer
    x = 377,135.10

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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.