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Finding the Fourth Proportional to 635.40, 876.38 and 425.48

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Solution

The fourth proportional to 635.40, 876.38 and 425.48 is: 586.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.40 : 876.38 = 425.48 : x
  2. Step 2: Convert to fraction form
    635.40/876.38 = 425.48/x
  3. Step 3: Cross multiply
    635.40x = 876.38 × 425.48
  4. Step 4: Simplify right side
    635.40x = 372,875.65
  5. Step 5: Solve for x
    x = 372,875.65/635.40
  6. Step 6: Final answer
    x = 586.84

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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.