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Finding the Fourth Proportional to 248.60, 372.18 and 157.40

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Solution

The fourth proportional to 248.60, 372.18 and 157.40 is: 235.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.60 : 372.18 = 157.40 : x
  2. Step 2: Convert to fraction form
    248.60/372.18 = 157.40/x
  3. Step 3: Cross multiply
    248.60x = 372.18 × 157.40
  4. Step 4: Simplify right side
    248.60x = 58,581.13
  5. Step 5: Solve for x
    x = 58,581.13/248.60
  6. Step 6: Final answer
    x = 235.64

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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.