Home / 2,145.76-2,961.20-1,214.24

Finding the Fourth Proportional to 2,145.76, 2,961.20 and 1,214.24

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Solution

The fourth proportional to 2,145.76, 2,961.20 and 1,214.24 is: 1,675.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.76 : 2,961.20 = 1,214.24 : x
  2. Step 2: Convert to fraction form
    2,145.76/2,961.20 = 1,214.24/x
  3. Step 3: Cross multiply
    2,145.76x = 2,961.20 × 1,214.24
  4. Step 4: Simplify right side
    2,145.76x = 3,595,607.49
  5. Step 5: Solve for x
    x = 3,595,607.49/2,145.76
  6. Step 6: Final answer
    x = 1,675.68

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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.