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Finding the Fourth Proportional to 381,317.28, 571,980 and 115,080.18

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Solution

The fourth proportional to 381,317.28, 571,980 and 115,080.18 is: 172,621.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,317.28 : 571,980 = 115,080.18 : x
  2. Step 2: Convert to fraction form
    381,317.28/571,980 = 115,080.18/x
  3. Step 3: Cross multiply
    381,317.28x = 571,980 × 115,080.18
  4. Step 4: Simplify right side
    381,317.28x = 65,823,561,356.40
  5. Step 5: Solve for x
    x = 65,823,561,356.40/381,317.28
  6. Step 6: Final answer
    x = 172,621.50

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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.