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Finding the Fourth Proportional to 478.77, 659.32 and 449.10

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Solution

The fourth proportional to 478.77, 659.32 and 449.10 is: 618.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.77 : 659.32 = 449.10 : x
  2. Step 2: Convert to fraction form
    478.77/659.32 = 449.10/x
  3. Step 3: Cross multiply
    478.77x = 659.32 × 449.10
  4. Step 4: Simplify right side
    478.77x = 296,099.49
  5. Step 5: Solve for x
    x = 296,099.49/478.77
  6. Step 6: Final answer
    x = 618.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.