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Finding the Fourth Proportional to 1,718.58, 2,578.04 and 486.03

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Solution

The fourth proportional to 1,718.58, 2,578.04 and 486.03 is: 729.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.58 : 2,578.04 = 486.03 : x
  2. Step 2: Convert to fraction form
    1,718.58/2,578.04 = 486.03/x
  3. Step 3: Cross multiply
    1,718.58x = 2,578.04 × 486.03
  4. Step 4: Simplify right side
    1,718.58x = 1,253,002.35
  5. Step 5: Solve for x
    x = 1,253,002.35/1,718.58
  6. Step 6: Final answer
    x = 729.09

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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.