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Finding the Fourth Proportional to 1,739.71, 2,609.50 and 699.40

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Solution

The fourth proportional to 1,739.71, 2,609.50 and 699.40 is: 1,049.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,739.71 : 2,609.50 = 699.40 : x
  2. Step 2: Convert to fraction form
    1,739.71/2,609.50 = 699.40/x
  3. Step 3: Cross multiply
    1,739.71x = 2,609.50 × 699.40
  4. Step 4: Simplify right side
    1,739.71x = 1,825,080.80
  5. Step 5: Solve for x
    x = 1,825,080.80/1,739.71
  6. Step 6: Final answer
    x = 1,049.07

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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.