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Finding the Fourth Proportional to 478.03, 659.34 and 291.53

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Solution

The fourth proportional to 478.03, 659.34 and 291.53 is: 402.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.03 : 659.34 = 291.53 : x
  2. Step 2: Convert to fraction form
    478.03/659.34 = 291.53/x
  3. Step 3: Cross multiply
    478.03x = 659.34 × 291.53
  4. Step 4: Simplify right side
    478.03x = 192,217.39
  5. Step 5: Solve for x
    x = 192,217.39/478.03
  6. Step 6: Final answer
    x = 402.10

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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.