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Finding the Fourth Proportional to 1,679.81, 2,318.18 and 923.58

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Solution

The fourth proportional to 1,679.81, 2,318.18 and 923.58 is: 1,274.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.81 : 2,318.18 = 923.58 : x
  2. Step 2: Convert to fraction form
    1,679.81/2,318.18 = 923.58/x
  3. Step 3: Cross multiply
    1,679.81x = 2,318.18 × 923.58
  4. Step 4: Simplify right side
    1,679.81x = 2,141,024.68
  5. Step 5: Solve for x
    x = 2,141,024.68/1,679.81
  6. Step 6: Final answer
    x = 1,274.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.