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Finding the Fourth Proportional to 287.55, 431.26 and 125.08

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Solution

The fourth proportional to 287.55, 431.26 and 125.08 is: 187.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.55 : 431.26 = 125.08 : x
  2. Step 2: Convert to fraction form
    287.55/431.26 = 125.08/x
  3. Step 3: Cross multiply
    287.55x = 431.26 × 125.08
  4. Step 4: Simplify right side
    287.55x = 53,940.61
  5. Step 5: Solve for x
    x = 53,940.61/287.55
  6. Step 6: Final answer
    x = 187.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.