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Finding the Fourth Proportional to 617,139.16, 925,708.76 and 261,904.07

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Solution

The fourth proportional to 617,139.16, 925,708.76 and 261,904.07 is: 392,856.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,139.16 : 925,708.76 = 261,904.07 : x
  2. Step 2: Convert to fraction form
    617,139.16/925,708.76 = 261,904.07/x
  3. Step 3: Cross multiply
    617,139.16x = 925,708.76 × 261,904.07
  4. Step 4: Simplify right side
    617,139.16x = 242,446,891,878.65
  5. Step 5: Solve for x
    x = 242,446,891,878.65/617,139.16
  6. Step 6: Final answer
    x = 392,856.11

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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.