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Finding the Fourth Proportional to 279,082.40, 385,129.32 and 151,756.88

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Solution

The fourth proportional to 279,082.40, 385,129.32 and 151,756.88 is: 209,422.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,082.40 : 385,129.32 = 151,756.88 : x
  2. Step 2: Convert to fraction form
    279,082.40/385,129.32 = 151,756.88/x
  3. Step 3: Cross multiply
    279,082.40x = 385,129.32 × 151,756.88
  4. Step 4: Simplify right side
    279,082.40x = 58,446,023,999.72
  5. Step 5: Solve for x
    x = 58,446,023,999.72/279,082.40
  6. Step 6: Final answer
    x = 209,422.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.