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Finding the Fourth Proportional to 627.08, 865.20 and 430.64

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Solution

The fourth proportional to 627.08, 865.20 and 430.64 is: 594.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.08 : 865.20 = 430.64 : x
  2. Step 2: Convert to fraction form
    627.08/865.20 = 430.64/x
  3. Step 3: Cross multiply
    627.08x = 865.20 × 430.64
  4. Step 4: Simplify right side
    627.08x = 372,589.73
  5. Step 5: Solve for x
    x = 372,589.73/627.08
  6. Step 6: Final answer
    x = 594.17

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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.