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Finding the Fourth Proportional to 2,663.44, 3,995.64 and 931.76

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Solution

The fourth proportional to 2,663.44, 3,995.64 and 931.76 is: 1,397.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,663.44 : 3,995.64 = 931.76 : x
  2. Step 2: Convert to fraction form
    2,663.44/3,995.64 = 931.76/x
  3. Step 3: Cross multiply
    2,663.44x = 3,995.64 × 931.76
  4. Step 4: Simplify right side
    2,663.44x = 3,722,977.53
  5. Step 5: Solve for x
    x = 3,722,977.53/2,663.44
  6. Step 6: Final answer
    x = 1,397.81

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1.5x scale

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.