Home / 2,165.60-2,987.55-1,379.16

Finding the Fourth Proportional to 2,165.60, 2,987.55 and 1,379.16

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Solution

The fourth proportional to 2,165.60, 2,987.55 and 1,379.16 is: 1,902.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.60 : 2,987.55 = 1,379.16 : x
  2. Step 2: Convert to fraction form
    2,165.60/2,987.55 = 1,379.16/x
  3. Step 3: Cross multiply
    2,165.60x = 2,987.55 × 1,379.16
  4. Step 4: Simplify right side
    2,165.60x = 4,120,309.46
  5. Step 5: Solve for x
    x = 4,120,309.46/2,165.60
  6. Step 6: Final answer
    x = 1,902.62

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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.