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Finding the Fourth Proportional to 443.16, 611.28 and 356.04

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Solution

The fourth proportional to 443.16, 611.28 and 356.04 is: 491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.16 : 611.28 = 356.04 : x
  2. Step 2: Convert to fraction form
    443.16/611.28 = 356.04/x
  3. Step 3: Cross multiply
    443.16x = 611.28 × 356.04
  4. Step 4: Simplify right side
    443.16x = 217,640.13
  5. Step 5: Solve for x
    x = 217,640.13/443.16
  6. Step 6: Final answer
    x = 491.11

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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.