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Finding the Fourth Proportional to 1,769.88, 2,442.38 and 983.91

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Solution

The fourth proportional to 1,769.88, 2,442.38 and 983.91 is: 1,357.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.88 : 2,442.38 = 983.91 : x
  2. Step 2: Convert to fraction form
    1,769.88/2,442.38 = 983.91/x
  3. Step 3: Cross multiply
    1,769.88x = 2,442.38 × 983.91
  4. Step 4: Simplify right side
    1,769.88x = 2,403,077.19
  5. Step 5: Solve for x
    x = 2,403,077.19/1,769.88
  6. Step 6: Final answer
    x = 1,357.76

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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.