Home / 2,152.89-3,228.63-691.70

Finding the Fourth Proportional to 2,152.89, 3,228.63 and 691.70

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Solution

The fourth proportional to 2,152.89, 3,228.63 and 691.70 is: 1,037.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,152.89 : 3,228.63 = 691.70 : x
  2. Step 2: Convert to fraction form
    2,152.89/3,228.63 = 691.70/x
  3. Step 3: Cross multiply
    2,152.89x = 3,228.63 × 691.70
  4. Step 4: Simplify right side
    2,152.89x = 2,233,227.23
  5. Step 5: Solve for x
    x = 2,233,227.23/2,152.89
  6. Step 6: Final answer
    x = 1,037.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.