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Finding the Fourth Proportional to 448,685.70, 672,121.35 and 279,687.30

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Solution

The fourth proportional to 448,685.70, 672,121.35 and 279,687.30 is: 418,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,685.70 : 672,121.35 = 279,687.30 : x
  2. Step 2: Convert to fraction form
    448,685.70/672,121.35 = 279,687.30/x
  3. Step 3: Cross multiply
    448,685.70x = 672,121.35 × 279,687.30
  4. Step 4: Simplify right side
    448,685.70x = 187,983,805,653.86
  5. Step 5: Solve for x
    x = 187,983,805,653.86/448,685.70
  6. Step 6: Final answer
    x = 418,965.45

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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.