Home / 1,439.90-2,157.24-891.80

Finding the Fourth Proportional to 1,439.90, 2,157.24 and 891.80

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Solution

The fourth proportional to 1,439.90, 2,157.24 and 891.80 is: 1,336.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.90 : 2,157.24 = 891.80 : x
  2. Step 2: Convert to fraction form
    1,439.90/2,157.24 = 891.80/x
  3. Step 3: Cross multiply
    1,439.90x = 2,157.24 × 891.80
  4. Step 4: Simplify right side
    1,439.90x = 1,923,826.63
  5. Step 5: Solve for x
    x = 1,923,826.63/1,439.90
  6. Step 6: Final answer
    x = 1,336.08

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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.