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Finding the Fourth Proportional to 635.43, 874.93 and 486.18

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Solution

The fourth proportional to 635.43, 874.93 and 486.18 is: 669.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.43 : 874.93 = 486.18 : x
  2. Step 2: Convert to fraction form
    635.43/874.93 = 486.18/x
  3. Step 3: Cross multiply
    635.43x = 874.93 × 486.18
  4. Step 4: Simplify right side
    635.43x = 425,373.47
  5. Step 5: Solve for x
    x = 425,373.47/635.43
  6. Step 6: Final answer
    x = 669.43

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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.