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Finding the Fourth Proportional to 478.62, 661.15 and 375.02

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Solution

The fourth proportional to 478.62, 661.15 and 375.02 is: 518.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.62 : 661.15 = 375.02 : x
  2. Step 2: Convert to fraction form
    478.62/661.15 = 375.02/x
  3. Step 3: Cross multiply
    478.62x = 661.15 × 375.02
  4. Step 4: Simplify right side
    478.62x = 247,942.01
  5. Step 5: Solve for x
    x = 247,942.01/478.62
  6. Step 6: Final answer
    x = 518.04

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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.