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Finding the Fourth Proportional to 421.17, 627.57 and 375.17

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Solution

The fourth proportional to 421.17, 627.57 and 375.17 is: 559.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.17 : 627.57 = 375.17 : x
  2. Step 2: Convert to fraction form
    421.17/627.57 = 375.17/x
  3. Step 3: Cross multiply
    421.17x = 627.57 × 375.17
  4. Step 4: Simplify right side
    421.17x = 235,445.12
  5. Step 5: Solve for x
    x = 235,445.12/421.17
  6. Step 6: Final answer
    x = 559.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.