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Finding the Fourth Proportional to 636.02, 876.30 and 486.38

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Solution

The fourth proportional to 636.02, 876.30 and 486.38 is: 670.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.02 : 876.30 = 486.38 : x
  2. Step 2: Convert to fraction form
    636.02/876.30 = 486.38/x
  3. Step 3: Cross multiply
    636.02x = 876.30 × 486.38
  4. Step 4: Simplify right side
    636.02x = 426,214.79
  5. Step 5: Solve for x
    x = 426,214.79/636.02
  6. Step 6: Final answer
    x = 670.13

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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.