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Finding the Fourth Proportional to 399.95, 552.18 and 275.57

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Solution

The fourth proportional to 399.95, 552.18 and 275.57 is: 380.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.95 : 552.18 = 275.57 : x
  2. Step 2: Convert to fraction form
    399.95/552.18 = 275.57/x
  3. Step 3: Cross multiply
    399.95x = 552.18 × 275.57
  4. Step 4: Simplify right side
    399.95x = 152,164.24
  5. Step 5: Solve for x
    x = 152,164.24/399.95
  6. Step 6: Final answer
    x = 380.46

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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.