Home / 1,780.35-2,456.76-983.71

Finding the Fourth Proportional to 1,780.35, 2,456.76 and 983.71

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Solution

The fourth proportional to 1,780.35, 2,456.76 and 983.71 is: 1,357.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.35 : 2,456.76 = 983.71 : x
  2. Step 2: Convert to fraction form
    1,780.35/2,456.76 = 983.71/x
  3. Step 3: Cross multiply
    1,780.35x = 2,456.76 × 983.71
  4. Step 4: Simplify right side
    1,780.35x = 2,416,739.38
  5. Step 5: Solve for x
    x = 2,416,739.38/1,780.35
  6. Step 6: Final answer
    x = 1,357.45

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1.5x scale

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.