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Finding the Fourth Proportional to 448,687.20, 672,123.60 and 279,688.80

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Solution

The fourth proportional to 448,687.20, 672,123.60 and 279,688.80 is: 418,967.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,687.20 : 672,123.60 = 279,688.80 : x
  2. Step 2: Convert to fraction form
    448,687.20/672,123.60 = 279,688.80/x
  3. Step 3: Cross multiply
    448,687.20x = 672,123.60 × 279,688.80
  4. Step 4: Simplify right side
    448,687.20x = 187,985,443,135.68
  5. Step 5: Solve for x
    x = 187,985,443,135.68/448,687.20
  6. Step 6: Final answer
    x = 418,967.70

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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.