Home / 1,729.46-2,387.10-1,021.38

Finding the Fourth Proportional to 1,729.46, 2,387.10 and 1,021.38

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Solution

The fourth proportional to 1,729.46, 2,387.10 and 1,021.38 is: 1,409.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.46 : 2,387.10 = 1,021.38 : x
  2. Step 2: Convert to fraction form
    1,729.46/2,387.10 = 1,021.38/x
  3. Step 3: Cross multiply
    1,729.46x = 2,387.10 × 1,021.38
  4. Step 4: Simplify right side
    1,729.46x = 2,438,136.20
  5. Step 5: Solve for x
    x = 2,438,136.20/1,729.46
  6. Step 6: Final answer
    x = 1,409.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.