Home / 2,921.81-4,381.68-841.25

Finding the Fourth Proportional to 2,921.81, 4,381.68 and 841.25

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Solution

The fourth proportional to 2,921.81, 4,381.68 and 841.25 is: 1,261.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.81 : 4,381.68 = 841.25 : x
  2. Step 2: Convert to fraction form
    2,921.81/4,381.68 = 841.25/x
  3. Step 3: Cross multiply
    2,921.81x = 4,381.68 × 841.25
  4. Step 4: Simplify right side
    2,921.81x = 3,686,099.25
  5. Step 5: Solve for x
    x = 3,686,099.25/2,921.81
  6. Step 6: Final answer
    x = 1,261.58

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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.