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Finding the Fourth Proportional to 611,863.20, 917,479.64 and 274,614.73

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Solution

The fourth proportional to 611,863.20, 917,479.64 and 274,614.73 is: 411,780.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,863.20 : 917,479.64 = 274,614.73 : x
  2. Step 2: Convert to fraction form
    611,863.20/917,479.64 = 274,614.73/x
  3. Step 3: Cross multiply
    611,863.20x = 917,479.64 × 274,614.73
  4. Step 4: Simplify right side
    611,863.20x = 251,953,423,619.10
  5. Step 5: Solve for x
    x = 251,953,423,619.10/611,863.20
  6. Step 6: Final answer
    x = 411,780.65

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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.