Home / 1,780.12-2,458.38-1,337.32

Finding the Fourth Proportional to 1,780.12, 2,458.38 and 1,337.32

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Solution

The fourth proportional to 1,780.12, 2,458.38 and 1,337.32 is: 1,846.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.12 : 2,458.38 = 1,337.32 : x
  2. Step 2: Convert to fraction form
    1,780.12/2,458.38 = 1,337.32/x
  3. Step 3: Cross multiply
    1,780.12x = 2,458.38 × 1,337.32
  4. Step 4: Simplify right side
    1,780.12x = 3,287,640.74
  5. Step 5: Solve for x
    x = 3,287,640.74/1,780.12
  6. Step 6: Final answer
    x = 1,846.86

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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.