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Finding the Fourth Proportional to 279,063.52, 385,082.64 and 154,887.76

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Solution

The fourth proportional to 279,063.52, 385,082.64 and 154,887.76 is: 213,731.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,063.52 : 385,082.64 = 154,887.76 : x
  2. Step 2: Convert to fraction form
    279,063.52/385,082.64 = 154,887.76/x
  3. Step 3: Cross multiply
    279,063.52x = 385,082.64 × 154,887.76
  4. Step 4: Simplify right side
    279,063.52x = 59,644,587,524.49
  5. Step 5: Solve for x
    x = 59,644,587,524.49/279,063.52
  6. Step 6: Final answer
    x = 213,731.22

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1.5x scale

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.