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Finding the Fourth Proportional to 1,359.66, 2,039.53 and 923.86

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Solution

The fourth proportional to 1,359.66, 2,039.53 and 923.86 is: 1,385.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.66 : 2,039.53 = 923.86 : x
  2. Step 2: Convert to fraction form
    1,359.66/2,039.53 = 923.86/x
  3. Step 3: Cross multiply
    1,359.66x = 2,039.53 × 923.86
  4. Step 4: Simplify right side
    1,359.66x = 1,884,230.69
  5. Step 5: Solve for x
    x = 1,884,230.69/1,359.66
  6. Step 6: Final answer
    x = 1,385.81

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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.