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Finding the Fourth Proportional to 285,995.60, 428,995.92 and 72,763.76

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Solution

The fourth proportional to 285,995.60, 428,995.92 and 72,763.76 is: 109,146.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,995.60 : 428,995.92 = 72,763.76 : x
  2. Step 2: Convert to fraction form
    285,995.60/428,995.92 = 72,763.76/x
  3. Step 3: Cross multiply
    285,995.60x = 428,995.92 × 72,763.76
  4. Step 4: Simplify right side
    285,995.60x = 31,215,354,018.88
  5. Step 5: Solve for x
    x = 31,215,354,018.88/285,995.60
  6. Step 6: Final answer
    x = 109,146.28

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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.