Home / 1,780.37-2,456.90-983.75

Finding the Fourth Proportional to 1,780.37, 2,456.90 and 983.75

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Solution

The fourth proportional to 1,780.37, 2,456.90 and 983.75 is: 1,357.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.37 : 2,456.90 = 983.75 : x
  2. Step 2: Convert to fraction form
    1,780.37/2,456.90 = 983.75/x
  3. Step 3: Cross multiply
    1,780.37x = 2,456.90 × 983.75
  4. Step 4: Simplify right side
    1,780.37x = 2,416,977.83
  5. Step 5: Solve for x
    x = 2,416,977.83/1,780.37
  6. Step 6: Final answer
    x = 1,357.57

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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.