Home / 1,780.03-2,456.39-983.42

Finding the Fourth Proportional to 1,780.03, 2,456.39 and 983.42

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Solution

The fourth proportional to 1,780.03, 2,456.39 and 983.42 is: 1,357.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.03 : 2,456.39 = 983.42 : x
  2. Step 2: Convert to fraction form
    1,780.03/2,456.39 = 983.42/x
  3. Step 3: Cross multiply
    1,780.03x = 2,456.39 × 983.42
  4. Step 4: Simplify right side
    1,780.03x = 2,415,650.77
  5. Step 5: Solve for x
    x = 2,415,650.77/1,780.03
  6. Step 6: Final answer
    x = 1,357.08

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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.