Home / 1,721.40-2,380.14-1,502.70

Finding the Fourth Proportional to 1,721.40, 2,380.14 and 1,502.70

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Solution

The fourth proportional to 1,721.40, 2,380.14 and 1,502.70 is: 2,077.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.40 : 2,380.14 = 1,502.70 : x
  2. Step 2: Convert to fraction form
    1,721.40/2,380.14 = 1,502.70/x
  3. Step 3: Cross multiply
    1,721.40x = 2,380.14 × 1,502.70
  4. Step 4: Simplify right side
    1,721.40x = 3,576,636.38
  5. Step 5: Solve for x
    x = 3,576,636.38/1,721.40
  6. Step 6: Final answer
    x = 2,077.75

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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.