Home / 1,421.50-2,132.34-381.48

Finding the Fourth Proportional to 1,421.50, 2,132.34 and 381.48

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Solution

The fourth proportional to 1,421.50, 2,132.34 and 381.48 is: 572.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.50 : 2,132.34 = 381.48 : x
  2. Step 2: Convert to fraction form
    1,421.50/2,132.34 = 381.48/x
  3. Step 3: Cross multiply
    1,421.50x = 2,132.34 × 381.48
  4. Step 4: Simplify right side
    1,421.50x = 813,445.06
  5. Step 5: Solve for x
    x = 813,445.06/1,421.50
  6. Step 6: Final answer
    x = 572.24

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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.