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Finding the Third Proportional to 157 and 247.50

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Solution

The third proportional to 157 and 247.50 is: 390.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    157 : 247.50 = 247.50 : x
  2. Step 2: Convert to fraction form
    157/247.50 = 247.50/x
  3. Step 3: Cross multiply
    157x = 247.50 × 247.50
  4. Step 4: Simplify right side
    157x = 61,256.25
  5. Step 5: Solve for x
    x = 61,256.25/157
  6. Step 6: Final answer
    x = 390.17

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.