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Finding the Fourth Proportional to 865.06, 1,297.78 and 248.76

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Solution

The fourth proportional to 865.06, 1,297.78 and 248.76 is: 373.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    865.06 : 1,297.78 = 248.76 : x
  2. Step 2: Convert to fraction form
    865.06/1,297.78 = 248.76/x
  3. Step 3: Cross multiply
    865.06x = 1,297.78 × 248.76
  4. Step 4: Simplify right side
    865.06x = 322,835.13
  5. Step 5: Solve for x
    x = 322,835.13/865.06
  6. Step 6: Final answer
    x = 373.19

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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.