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Finding the Fourth Proportional to 305,553.80, 458,330.70 and 279,288.20

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Solution

The fourth proportional to 305,553.80, 458,330.70 and 279,288.20 is: 418,932.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,553.80 : 458,330.70 = 279,288.20 : x
  2. Step 2: Convert to fraction form
    305,553.80/458,330.70 = 279,288.20/x
  3. Step 3: Cross multiply
    305,553.80x = 458,330.70 × 279,288.20
  4. Step 4: Simplify right side
    305,553.80x = 128,006,356,207.74
  5. Step 5: Solve for x
    x = 128,006,356,207.74/305,553.80
  6. Step 6: Final answer
    x = 418,932.30

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1.5x scale

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.