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Finding the Fourth Proportional to 1,779.77, 2,456.03 and 983.15

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Solution

The fourth proportional to 1,779.77, 2,456.03 and 983.15 is: 1,356.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.77 : 2,456.03 = 983.15 : x
  2. Step 2: Convert to fraction form
    1,779.77/2,456.03 = 983.15/x
  3. Step 3: Cross multiply
    1,779.77x = 2,456.03 × 983.15
  4. Step 4: Simplify right side
    1,779.77x = 2,414,654.49
  5. Step 5: Solve for x
    x = 2,414,654.49/1,779.77
  6. Step 6: Final answer
    x = 1,356.73

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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.