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Finding the Fourth Proportional to 1,718.69, 2,578.23 and 548.74

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Solution

The fourth proportional to 1,718.69, 2,578.23 and 548.74 is: 823.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,718.69 : 2,578.23 = 548.74 : x
  2. Step 2: Convert to fraction form
    1,718.69/2,578.23 = 548.74/x
  3. Step 3: Cross multiply
    1,718.69x = 2,578.23 × 548.74
  4. Step 4: Simplify right side
    1,718.69x = 1,414,781.15
  5. Step 5: Solve for x
    x = 1,414,781.15/1,718.69
  6. Step 6: Final answer
    x = 823.18

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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.