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Finding the Fourth Proportional to 285,278.70, 427,238.86 and 165,082.28

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Solution

The fourth proportional to 285,278.70, 427,238.86 and 165,082.28 is: 247,230.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,278.70 : 427,238.86 = 165,082.28 : x
  2. Step 2: Convert to fraction form
    285,278.70/427,238.86 = 165,082.28/x
  3. Step 3: Cross multiply
    285,278.70x = 427,238.86 × 165,082.28
  4. Step 4: Simplify right side
    285,278.70x = 70,529,565,113.40
  5. Step 5: Solve for x
    x = 70,529,565,113.40/285,278.70
  6. Step 6: Final answer
    x = 247,230.39

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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.