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Finding the Fourth Proportional to 2,347.68, 3,521.34 and 979.68

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Solution

The fourth proportional to 2,347.68, 3,521.34 and 979.68 is: 1,469.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,347.68 : 3,521.34 = 979.68 : x
  2. Step 2: Convert to fraction form
    2,347.68/3,521.34 = 979.68/x
  3. Step 3: Cross multiply
    2,347.68x = 3,521.34 × 979.68
  4. Step 4: Simplify right side
    2,347.68x = 3,449,786.37
  5. Step 5: Solve for x
    x = 3,449,786.37/2,347.68
  6. Step 6: Final answer
    x = 1,469.44

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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.