Home / 1,423.30-2,130.90-1,261.30

Finding the Fourth Proportional to 1,423.30, 2,130.90 and 1,261.30

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Solution

The fourth proportional to 1,423.30, 2,130.90 and 1,261.30 is: 1,888.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.30 : 2,130.90 = 1,261.30 : x
  2. Step 2: Convert to fraction form
    1,423.30/2,130.90 = 1,261.30/x
  3. Step 3: Cross multiply
    1,423.30x = 2,130.90 × 1,261.30
  4. Step 4: Simplify right side
    1,423.30x = 2,687,704.17
  5. Step 5: Solve for x
    x = 2,687,704.17/1,423.30
  6. Step 6: Final answer
    x = 1,888.36

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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.