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Finding the Fourth Proportional to 1,407.87, 1,943.06 and 884.61

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Solution

The fourth proportional to 1,407.87, 1,943.06 and 884.61 is: 1,220.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.87 : 1,943.06 = 884.61 : x
  2. Step 2: Convert to fraction form
    1,407.87/1,943.06 = 884.61/x
  3. Step 3: Cross multiply
    1,407.87x = 1,943.06 × 884.61
  4. Step 4: Simplify right side
    1,407.87x = 1,718,845.88
  5. Step 5: Solve for x
    x = 1,718,845.88/1,407.87
  6. Step 6: Final answer
    x = 1,220.88

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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.