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Finding the Fourth Proportional to 400.32, 549.03 and 395.52

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Solution

The fourth proportional to 400.32, 549.03 and 395.52 is: 542.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.32 : 549.03 = 395.52 : x
  2. Step 2: Convert to fraction form
    400.32/549.03 = 395.52/x
  3. Step 3: Cross multiply
    400.32x = 549.03 × 395.52
  4. Step 4: Simplify right side
    400.32x = 217,152.35
  5. Step 5: Solve for x
    x = 217,152.35/400.32
  6. Step 6: Final answer
    x = 542.45

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.