Home / 2,158.48-2,979.18-1,372.38

Finding the Fourth Proportional to 2,158.48, 2,979.18 and 1,372.38

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Solution

The fourth proportional to 2,158.48, 2,979.18 and 1,372.38 is: 1,894.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158.48 : 2,979.18 = 1,372.38 : x
  2. Step 2: Convert to fraction form
    2,158.48/2,979.18 = 1,372.38/x
  3. Step 3: Cross multiply
    2,158.48x = 2,979.18 × 1,372.38
  4. Step 4: Simplify right side
    2,158.48x = 4,088,567.05
  5. Step 5: Solve for x
    x = 4,088,567.05/2,158.48
  6. Step 6: Final answer
    x = 1,894.19

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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.