Home / 2,921.40-4,381.20-841.59

Finding the Fourth Proportional to 2,921.40, 4,381.20 and 841.59

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Solution

The fourth proportional to 2,921.40, 4,381.20 and 841.59 is: 1,262.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.40 : 4,381.20 = 841.59 : x
  2. Step 2: Convert to fraction form
    2,921.40/4,381.20 = 841.59/x
  3. Step 3: Cross multiply
    2,921.40x = 4,381.20 × 841.59
  4. Step 4: Simplify right side
    2,921.40x = 3,687,174.11
  5. Step 5: Solve for x
    x = 3,687,174.11/2,921.40
  6. Step 6: Final answer
    x = 1,262.13

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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.