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Finding the Fourth Proportional to 400.32, 552.24 and 313.20

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Solution

The fourth proportional to 400.32, 552.24 and 313.20 is: 432.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.32 : 552.24 = 313.20 : x
  2. Step 2: Convert to fraction form
    400.32/552.24 = 313.20/x
  3. Step 3: Cross multiply
    400.32x = 552.24 × 313.20
  4. Step 4: Simplify right side
    400.32x = 172,961.57
  5. Step 5: Solve for x
    x = 172,961.57/400.32
  6. Step 6: Final answer
    x = 432.06

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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.