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Finding the Fourth Proportional to 1,718.67, 2,578.10 and 486.17

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Solution

The fourth proportional to 1,718.67, 2,578.10 and 486.17 is: 729.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.67 : 2,578.10 = 486.17 : x
  2. Step 2: Convert to fraction form
    1,718.67/2,578.10 = 486.17/x
  3. Step 3: Cross multiply
    1,718.67x = 2,578.10 × 486.17
  4. Step 4: Simplify right side
    1,718.67x = 1,253,394.88
  5. Step 5: Solve for x
    x = 1,253,394.88/1,718.67
  6. Step 6: Final answer
    x = 729.28

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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.