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Finding the Fourth Proportional to 1,697.72, 2,544.96 and 831.08

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Solution

The fourth proportional to 1,697.72, 2,544.96 and 831.08 is: 1,245.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,697.72 : 2,544.96 = 831.08 : x
  2. Step 2: Convert to fraction form
    1,697.72/2,544.96 = 831.08/x
  3. Step 3: Cross multiply
    1,697.72x = 2,544.96 × 831.08
  4. Step 4: Simplify right side
    1,697.72x = 2,115,065.36
  5. Step 5: Solve for x
    x = 2,115,065.36/1,697.72
  6. Step 6: Final answer
    x = 1,245.83

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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.