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Finding the Fourth Proportional to 917,709.20, 1,375,892.76 and 617,443.28

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Solution

The fourth proportional to 917,709.20, 1,375,892.76 and 617,443.28 is: 925,713.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,709.20 : 1,375,892.76 = 617,443.28 : x
  2. Step 2: Convert to fraction form
    917,709.20/1,375,892.76 = 617,443.28/x
  3. Step 3: Cross multiply
    917,709.20x = 1,375,892.76 × 617,443.28
  4. Step 4: Simplify right side
    917,709.20x = 849,535,738,662.65
  5. Step 5: Solve for x
    x = 849,535,738,662.65/917,709.20
  6. Step 6: Final answer
    x = 925,713.44

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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.