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Finding the Fourth Proportional to 635.04, 951.28 and 390.88

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Solution

The fourth proportional to 635.04, 951.28 and 390.88 is: 585.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.04 : 951.28 = 390.88 : x
  2. Step 2: Convert to fraction form
    635.04/951.28 = 390.88/x
  3. Step 3: Cross multiply
    635.04x = 951.28 × 390.88
  4. Step 4: Simplify right side
    635.04x = 371,836.33
  5. Step 5: Solve for x
    x = 371,836.33/635.04
  6. Step 6: Final answer
    x = 585.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.