Home / 1,718.20-2,371.20-972.12

Finding the Fourth Proportional to 1,718.20, 2,371.20 and 972.12

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Solution

The fourth proportional to 1,718.20, 2,371.20 and 972.12 is: 1,341.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.20 : 2,371.20 = 972.12 : x
  2. Step 2: Convert to fraction form
    1,718.20/2,371.20 = 972.12/x
  3. Step 3: Cross multiply
    1,718.20x = 2,371.20 × 972.12
  4. Step 4: Simplify right side
    1,718.20x = 2,305,090.94
  5. Step 5: Solve for x
    x = 2,305,090.94/1,718.20
  6. Step 6: Final answer
    x = 1,341.57

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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.