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Finding the Fourth Proportional to 1,721.75, 2,582.42 and 625.42

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Solution

The fourth proportional to 1,721.75, 2,582.42 and 625.42 is: 938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.75 : 2,582.42 = 625.42 : x
  2. Step 2: Convert to fraction form
    1,721.75/2,582.42 = 625.42/x
  3. Step 3: Cross multiply
    1,721.75x = 2,582.42 × 625.42
  4. Step 4: Simplify right side
    1,721.75x = 1,615,084.20
  5. Step 5: Solve for x
    x = 1,615,084.20/1,721.75
  6. Step 6: Final answer
    x = 938.05

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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.