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Finding the Fourth Proportional to 438,305.80, 656,292.30 and 279,675.40

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Solution

The fourth proportional to 438,305.80, 656,292.30 and 279,675.40 is: 418,768.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,305.80 : 656,292.30 = 279,675.40 : x
  2. Step 2: Convert to fraction form
    438,305.80/656,292.30 = 279,675.40/x
  3. Step 3: Cross multiply
    438,305.80x = 656,292.30 × 279,675.40
  4. Step 4: Simplify right side
    438,305.80x = 183,548,811,519.42
  5. Step 5: Solve for x
    x = 183,548,811,519.42/438,305.80
  6. Step 6: Final answer
    x = 418,768.84

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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.