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Finding the Fourth Proportional to 1,407.48, 1,943.64 and 884.43

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Solution

The fourth proportional to 1,407.48, 1,943.64 and 884.43 is: 1,221.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.48 : 1,943.64 = 884.43 : x
  2. Step 2: Convert to fraction form
    1,407.48/1,943.64 = 884.43/x
  3. Step 3: Cross multiply
    1,407.48x = 1,943.64 × 884.43
  4. Step 4: Simplify right side
    1,407.48x = 1,719,013.53
  5. Step 5: Solve for x
    x = 1,719,013.53/1,407.48
  6. Step 6: Final answer
    x = 1,221.34

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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.