Home / 2,153.62-3,230.76-921.03

Finding the Fourth Proportional to 2,153.62, 3,230.76 and 921.03

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Solution

The fourth proportional to 2,153.62, 3,230.76 and 921.03 is: 1,381.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.62 : 3,230.76 = 921.03 : x
  2. Step 2: Convert to fraction form
    2,153.62/3,230.76 = 921.03/x
  3. Step 3: Cross multiply
    2,153.62x = 3,230.76 × 921.03
  4. Step 4: Simplify right side
    2,153.62x = 2,975,626.88
  5. Step 5: Solve for x
    x = 2,975,626.88/2,153.62
  6. Step 6: Final answer
    x = 1,381.69

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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.