Home / 3,438.24-5,157.30-841.20

Finding the Fourth Proportional to 3,438.24, 5,157.30 and 841.20

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Solution

The fourth proportional to 3,438.24, 5,157.30 and 841.20 is: 1,261.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,438.24 : 5,157.30 = 841.20 : x
  2. Step 2: Convert to fraction form
    3,438.24/5,157.30 = 841.20/x
  3. Step 3: Cross multiply
    3,438.24x = 5,157.30 × 841.20
  4. Step 4: Simplify right side
    3,438.24x = 4,338,320.76
  5. Step 5: Solve for x
    x = 4,338,320.76/3,438.24
  6. Step 6: Final answer
    x = 1,261.79

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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.