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Finding the Fourth Proportional to 400.30, 552.54 and 253.06

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Solution

The fourth proportional to 400.30, 552.54 and 253.06 is: 349.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.30 : 552.54 = 253.06 : x
  2. Step 2: Convert to fraction form
    400.30/552.54 = 253.06/x
  3. Step 3: Cross multiply
    400.30x = 552.54 × 253.06
  4. Step 4: Simplify right side
    400.30x = 139,825.77
  5. Step 5: Solve for x
    x = 139,825.77/400.30
  6. Step 6: Final answer
    x = 349.30

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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.