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Finding the Fourth Proportional to 452.91, 624.08 and 428.40

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Solution

The fourth proportional to 452.91, 624.08 and 428.40 is: 590.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.91 : 624.08 = 428.40 : x
  2. Step 2: Convert to fraction form
    452.91/624.08 = 428.40/x
  3. Step 3: Cross multiply
    452.91x = 624.08 × 428.40
  4. Step 4: Simplify right side
    452.91x = 267,357.75
  5. Step 5: Solve for x
    x = 267,357.75/452.91
  6. Step 6: Final answer
    x = 590.32

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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.