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Finding the Fourth Proportional to 454.02, 626.56 and 279.40

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Solution

The fourth proportional to 454.02, 626.56 and 279.40 is: 385.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.02 : 626.56 = 279.40 : x
  2. Step 2: Convert to fraction form
    454.02/626.56 = 279.40/x
  3. Step 3: Cross multiply
    454.02x = 626.56 × 279.40
  4. Step 4: Simplify right side
    454.02x = 175,060.86
  5. Step 5: Solve for x
    x = 175,060.86/454.02
  6. Step 6: Final answer
    x = 385.58

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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.