Home / 1,381.50-2,070.98-1,261.26

Finding the Fourth Proportional to 1,381.50, 2,070.98 and 1,261.26

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Solution

The fourth proportional to 1,381.50, 2,070.98 and 1,261.26 is: 1,890.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,381.50 : 2,070.98 = 1,261.26 : x
  2. Step 2: Convert to fraction form
    1,381.50/2,070.98 = 1,261.26/x
  3. Step 3: Cross multiply
    1,381.50x = 2,070.98 × 1,261.26
  4. Step 4: Simplify right side
    1,381.50x = 2,612,044.23
  5. Step 5: Solve for x
    x = 2,612,044.23/1,381.50
  6. Step 6: Final answer
    x = 1,890.73

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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.