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Finding the Fourth Proportional to 1,721.48, 2,582.22 and 625.76

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Solution

The fourth proportional to 1,721.48, 2,582.22 and 625.76 is: 938.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.48 : 2,582.22 = 625.76 : x
  2. Step 2: Convert to fraction form
    1,721.48/2,582.22 = 625.76/x
  3. Step 3: Cross multiply
    1,721.48x = 2,582.22 × 625.76
  4. Step 4: Simplify right side
    1,721.48x = 1,615,849.99
  5. Step 5: Solve for x
    x = 1,615,849.99/1,721.48
  6. Step 6: Final answer
    x = 938.64

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1.5x scale

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.