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Finding the Fourth Proportional to 917,568, 1,376,468.64 and 252,720

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Solution

The fourth proportional to 917,568, 1,376,468.64 and 252,720 is: 379,112.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,568 : 1,376,468.64 = 252,720 : x
  2. Step 2: Convert to fraction form
    917,568/1,376,468.64 = 252,720/x
  3. Step 3: Cross multiply
    917,568x = 1,376,468.64 × 252,720
  4. Step 4: Simplify right side
    917,568x = 347,861,154,700.80
  5. Step 5: Solve for x
    x = 347,861,154,700.80/917,568
  6. Step 6: Final answer
    x = 379,112.13

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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.