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Finding the Fourth Proportional to 287.55, 396.14 and 250.47

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Solution

The fourth proportional to 287.55, 396.14 and 250.47 is: 345.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.55 : 396.14 = 250.47 : x
  2. Step 2: Convert to fraction form
    287.55/396.14 = 250.47/x
  3. Step 3: Cross multiply
    287.55x = 396.14 × 250.47
  4. Step 4: Simplify right side
    287.55x = 99,219.93
  5. Step 5: Solve for x
    x = 99,219.93/287.55
  6. Step 6: Final answer
    x = 345.05

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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.