Home / 2,158.90-2,979.24-1,319.46

Finding the Fourth Proportional to 2,158.90, 2,979.24 and 1,319.46

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Solution

The fourth proportional to 2,158.90, 2,979.24 and 1,319.46 is: 1,820.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.90 : 2,979.24 = 1,319.46 : x
  2. Step 2: Convert to fraction form
    2,158.90/2,979.24 = 1,319.46/x
  3. Step 3: Cross multiply
    2,158.90x = 2,979.24 × 1,319.46
  4. Step 4: Simplify right side
    2,158.90x = 3,930,988.01
  5. Step 5: Solve for x
    x = 3,930,988.01/2,158.90
  6. Step 6: Final answer
    x = 1,820.83

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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.