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Finding the Fourth Proportional to 488.04, 674.78 and 402.18

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Solution

The fourth proportional to 488.04, 674.78 and 402.18 is: 556.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.04 : 674.78 = 402.18 : x
  2. Step 2: Convert to fraction form
    488.04/674.78 = 402.18/x
  3. Step 3: Cross multiply
    488.04x = 674.78 × 402.18
  4. Step 4: Simplify right side
    488.04x = 271,381.01
  5. Step 5: Solve for x
    x = 271,381.01/488.04
  6. Step 6: Final answer
    x = 556.06

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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.