Home / 2,178.15-3,249.91-1,890.15

Finding the Fourth Proportional to 2,178.15, 3,249.91 and 1,890.15

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Solution

The fourth proportional to 2,178.15, 3,249.91 and 1,890.15 is: 2,820.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.15 : 3,249.91 = 1,890.15 : x
  2. Step 2: Convert to fraction form
    2,178.15/3,249.91 = 1,890.15/x
  3. Step 3: Cross multiply
    2,178.15x = 3,249.91 × 1,890.15
  4. Step 4: Simplify right side
    2,178.15x = 6,142,812.66
  5. Step 5: Solve for x
    x = 6,142,812.66/2,178.15
  6. Step 6: Final answer
    x = 2,820.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.