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Finding the Fourth Proportional to 617,124.71, 925,354.21 and 279,981.40

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Solution

The fourth proportional to 617,124.71, 925,354.21 and 279,981.40 is: 419,821.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,124.71 : 925,354.21 = 279,981.40 : x
  2. Step 2: Convert to fraction form
    617,124.71/925,354.21 = 279,981.40/x
  3. Step 3: Cross multiply
    617,124.71x = 925,354.21 × 279,981.40
  4. Step 4: Simplify right side
    617,124.71x = 259,081,969,060.92
  5. Step 5: Solve for x
    x = 259,081,969,060.92/617,124.71
  6. Step 6: Final answer
    x = 419,821.09

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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.