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Finding the Fourth Proportional to 1,769.91, 2,442.39 and 983.93

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Solution

The fourth proportional to 1,769.91, 2,442.39 and 983.93 is: 1,357.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.91 : 2,442.39 = 983.93 : x
  2. Step 2: Convert to fraction form
    1,769.91/2,442.39 = 983.93/x
  3. Step 3: Cross multiply
    1,769.91x = 2,442.39 × 983.93
  4. Step 4: Simplify right side
    1,769.91x = 2,403,128.58
  5. Step 5: Solve for x
    x = 2,403,128.58/1,769.91
  6. Step 6: Final answer
    x = 1,357.77

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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.