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Finding the Fourth Proportional to 397.76, 549.04 and 266.72

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Solution

The fourth proportional to 397.76, 549.04 and 266.72 is: 368.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.76 : 549.04 = 266.72 : x
  2. Step 2: Convert to fraction form
    397.76/549.04 = 266.72/x
  3. Step 3: Cross multiply
    397.76x = 549.04 × 266.72
  4. Step 4: Simplify right side
    397.76x = 146,439.95
  5. Step 5: Solve for x
    x = 146,439.95/397.76
  6. Step 6: Final answer
    x = 368.16

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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.