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Finding the Fourth Proportional to 628.86, 867.87 and 432.30

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Solution

The fourth proportional to 628.86, 867.87 and 432.30 is: 596.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.86 : 867.87 = 432.30 : x
  2. Step 2: Convert to fraction form
    628.86/867.87 = 432.30/x
  3. Step 3: Cross multiply
    628.86x = 867.87 × 432.30
  4. Step 4: Simplify right side
    628.86x = 375,180.20
  5. Step 5: Solve for x
    x = 375,180.20/628.86
  6. Step 6: Final answer
    x = 596.60

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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.