Home / 1,423.72-2,125.40-1,322.20

Finding the Fourth Proportional to 1,423.72, 2,125.40 and 1,322.20

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Solution

The fourth proportional to 1,423.72, 2,125.40 and 1,322.20 is: 1,973.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.72 : 2,125.40 = 1,322.20 : x
  2. Step 2: Convert to fraction form
    1,423.72/2,125.40 = 1,322.20/x
  3. Step 3: Cross multiply
    1,423.72x = 2,125.40 × 1,322.20
  4. Step 4: Simplify right side
    1,423.72x = 2,810,203.88
  5. Step 5: Solve for x
    x = 2,810,203.88/1,423.72
  6. Step 6: Final answer
    x = 1,973.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.