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Finding the Fourth Proportional to 400.30, 552.61 and 253.16

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Solution

The fourth proportional to 400.30, 552.61 and 253.16 is: 349.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.30 : 552.61 = 253.16 : x
  2. Step 2: Convert to fraction form
    400.30/552.61 = 253.16/x
  3. Step 3: Cross multiply
    400.30x = 552.61 × 253.16
  4. Step 4: Simplify right side
    400.30x = 139,898.75
  5. Step 5: Solve for x
    x = 139,898.75/400.30
  6. Step 6: Final answer
    x = 349.48

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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.