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Finding the Fourth Proportional to 1,334.97, 1,998.95 and 942.85

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Solution

The fourth proportional to 1,334.97, 1,998.95 and 942.85 is: 1,411.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.97 : 1,998.95 = 942.85 : x
  2. Step 2: Convert to fraction form
    1,334.97/1,998.95 = 942.85/x
  3. Step 3: Cross multiply
    1,334.97x = 1,998.95 × 942.85
  4. Step 4: Simplify right side
    1,334.97x = 1,884,710.01
  5. Step 5: Solve for x
    x = 1,884,710.01/1,334.97
  6. Step 6: Final answer
    x = 1,411.80

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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.