Home / 2,153.42-3,230.45-921.14

Finding the Fourth Proportional to 2,153.42, 3,230.45 and 921.14

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Solution

The fourth proportional to 2,153.42, 3,230.45 and 921.14 is: 1,381.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.42 : 3,230.45 = 921.14 : x
  2. Step 2: Convert to fraction form
    2,153.42/3,230.45 = 921.14/x
  3. Step 3: Cross multiply
    2,153.42x = 3,230.45 × 921.14
  4. Step 4: Simplify right side
    2,153.42x = 2,975,691.52
  5. Step 5: Solve for x
    x = 2,975,691.52/2,153.42
  6. Step 6: Final answer
    x = 1,381.85

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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.