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Finding the Fourth Proportional to 2,655.17, 3,982.74 and 923.79

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Solution

The fourth proportional to 2,655.17, 3,982.74 and 923.79 is: 1,385.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.17 : 3,982.74 = 923.79 : x
  2. Step 2: Convert to fraction form
    2,655.17/3,982.74 = 923.79/x
  3. Step 3: Cross multiply
    2,655.17x = 3,982.74 × 923.79
  4. Step 4: Simplify right side
    2,655.17x = 3,679,215.38
  5. Step 5: Solve for x
    x = 3,679,215.38/2,655.17
  6. Step 6: Final answer
    x = 1,385.68

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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.