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Finding the Fourth Proportional to 512,726.40, 769,079.48 and 153,140.78

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Solution

The fourth proportional to 512,726.40, 769,079.48 and 153,140.78 is: 229,708.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,726.40 : 769,079.48 = 153,140.78 : x
  2. Step 2: Convert to fraction form
    512,726.40/769,079.48 = 153,140.78/x
  3. Step 3: Cross multiply
    512,726.40x = 769,079.48 × 153,140.78
  4. Step 4: Simplify right side
    512,726.40x = 117,777,432,606.19
  5. Step 5: Solve for x
    x = 117,777,432,606.19/512,726.40
  6. Step 6: Final answer
    x = 229,708.15

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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.