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Finding the Fourth Proportional to 1,411.59, 1,947.22 and 992.58

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Solution

The fourth proportional to 1,411.59, 1,947.22 and 992.58 is: 1,369.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.59 : 1,947.22 = 992.58 : x
  2. Step 2: Convert to fraction form
    1,411.59/1,947.22 = 992.58/x
  3. Step 3: Cross multiply
    1,411.59x = 1,947.22 × 992.58
  4. Step 4: Simplify right side
    1,411.59x = 1,932,766.66
  5. Step 5: Solve for x
    x = 1,932,766.66/1,411.59
  6. Step 6: Final answer
    x = 1,369.22

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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.