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Finding the Fourth Proportional to 512,987.28, 769,519.60 and 153,129.71

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Solution

The fourth proportional to 512,987.28, 769,519.60 and 153,129.71 is: 229,706.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,987.28 : 769,519.60 = 153,129.71 : x
  2. Step 2: Convert to fraction form
    512,987.28/769,519.60 = 153,129.71/x
  3. Step 3: Cross multiply
    512,987.28x = 769,519.60 × 153,129.71
  4. Step 4: Simplify right side
    512,987.28x = 117,836,313,187.32
  5. Step 5: Solve for x
    x = 117,836,313,187.32/512,987.28
  6. Step 6: Final answer
    x = 229,706.11

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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.