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Finding the Fourth Proportional to 449.68, 675.60 and 287.68

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Solution

The fourth proportional to 449.68, 675.60 and 287.68 is: 432.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.68 : 675.60 = 287.68 : x
  2. Step 2: Convert to fraction form
    449.68/675.60 = 287.68/x
  3. Step 3: Cross multiply
    449.68x = 675.60 × 287.68
  4. Step 4: Simplify right side
    449.68x = 194,356.61
  5. Step 5: Solve for x
    x = 194,356.61/449.68
  6. Step 6: Final answer
    x = 432.21

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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.