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Finding the Fourth Proportional to 1,332.40, 1,998.69 and 844.78

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Solution

The fourth proportional to 1,332.40, 1,998.69 and 844.78 is: 1,267.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.40 : 1,998.69 = 844.78 : x
  2. Step 2: Convert to fraction form
    1,332.40/1,998.69 = 844.78/x
  3. Step 3: Cross multiply
    1,332.40x = 1,998.69 × 844.78
  4. Step 4: Simplify right side
    1,332.40x = 1,688,453.34
  5. Step 5: Solve for x
    x = 1,688,453.34/1,332.40
  6. Step 6: Final answer
    x = 1,267.23

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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.