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Finding the Fourth Proportional to 400.95, 553.23 and 253.53

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Solution

The fourth proportional to 400.95, 553.23 and 253.53 is: 349.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.95 : 553.23 = 253.53 : x
  2. Step 2: Convert to fraction form
    400.95/553.23 = 253.53/x
  3. Step 3: Cross multiply
    400.95x = 553.23 × 253.53
  4. Step 4: Simplify right side
    400.95x = 140,260.40
  5. Step 5: Solve for x
    x = 140,260.40/400.95
  6. Step 6: Final answer
    x = 349.82

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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.