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Finding the Fourth Proportional to 1,721.93, 2,581.73 and 626.15

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Solution

The fourth proportional to 1,721.93, 2,581.73 and 626.15 is: 938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.93 : 2,581.73 = 626.15 : x
  2. Step 2: Convert to fraction form
    1,721.93/2,581.73 = 626.15/x
  3. Step 3: Cross multiply
    1,721.93x = 2,581.73 × 626.15
  4. Step 4: Simplify right side
    1,721.93x = 1,616,543.15
  5. Step 5: Solve for x
    x = 1,616,543.15/1,721.93
  6. Step 6: Final answer
    x = 938.80

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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.