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Finding the Fourth Proportional to 1,332.47, 1,999.61 and 683.66

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Solution

The fourth proportional to 1,332.47, 1,999.61 and 683.66 is: 1,025.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.47 : 1,999.61 = 683.66 : x
  2. Step 2: Convert to fraction form
    1,332.47/1,999.61 = 683.66/x
  3. Step 3: Cross multiply
    1,332.47x = 1,999.61 × 683.66
  4. Step 4: Simplify right side
    1,332.47x = 1,367,039.96
  5. Step 5: Solve for x
    x = 1,367,039.96/1,332.47
  6. Step 6: Final answer
    x = 1,025.95

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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.