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Finding the Fourth Proportional to 666,966.80, 999,769.80 and 329,488.40

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Solution

The fourth proportional to 666,966.80, 999,769.80 and 329,488.40 is: 493,896.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,966.80 : 999,769.80 = 329,488.40 : x
  2. Step 2: Convert to fraction form
    666,966.80/999,769.80 = 329,488.40/x
  3. Step 3: Cross multiply
    666,966.80x = 999,769.80 × 329,488.40
  4. Step 4: Simplify right side
    666,966.80x = 329,412,551,770.32
  5. Step 5: Solve for x
    x = 329,412,551,770.32/666,966.80
  6. Step 6: Final answer
    x = 493,896.48

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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.