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Finding the Fourth Proportional to 1,610.87, 2,416.68 and 687.22

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Solution

The fourth proportional to 1,610.87, 2,416.68 and 687.22 is: 1,030.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,610.87 : 2,416.68 = 687.22 : x
  2. Step 2: Convert to fraction form
    1,610.87/2,416.68 = 687.22/x
  3. Step 3: Cross multiply
    1,610.87x = 2,416.68 × 687.22
  4. Step 4: Simplify right side
    1,610.87x = 1,660,784.79
  5. Step 5: Solve for x
    x = 1,660,784.79/1,610.87
  6. Step 6: Final answer
    x = 1,030.99

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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.