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Finding the Fourth Proportional to 511,715.20, 767,630.40 and 156,726.40

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Solution

The fourth proportional to 511,715.20, 767,630.40 and 156,726.40 is: 235,107.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,715.20 : 767,630.40 = 156,726.40 : x
  2. Step 2: Convert to fraction form
    511,715.20/767,630.40 = 156,726.40/x
  3. Step 3: Cross multiply
    511,715.20x = 767,630.40 × 156,726.40
  4. Step 4: Simplify right side
    511,715.20x = 120,307,949,122.56
  5. Step 5: Solve for x
    x = 120,307,949,122.56/511,715.20
  6. Step 6: Final answer
    x = 235,107.24

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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.