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Finding the Fourth Proportional to 279,900.80, 386,263.76 and 159,082.20

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Solution

The fourth proportional to 279,900.80, 386,263.76 and 159,082.20 is: 219,533.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,900.80 : 386,263.76 = 159,082.20 : x
  2. Step 2: Convert to fraction form
    279,900.80/386,263.76 = 159,082.20/x
  3. Step 3: Cross multiply
    279,900.80x = 386,263.76 × 159,082.20
  4. Step 4: Simplify right side
    279,900.80x = 61,447,687,925.66
  5. Step 5: Solve for x
    x = 61,447,687,925.66/279,900.80
  6. Step 6: Final answer
    x = 219,533.81

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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.