Home / 1,688.00-2,329.21-979.73

Finding the Fourth Proportional to 1,688.00, 2,329.21 and 979.73

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Solution

The fourth proportional to 1,688.00, 2,329.21 and 979.73 is: 1,351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.00 : 2,329.21 = 979.73 : x
  2. Step 2: Convert to fraction form
    1,688.00/2,329.21 = 979.73/x
  3. Step 3: Cross multiply
    1,688.00x = 2,329.21 × 979.73
  4. Step 4: Simplify right side
    1,688.00x = 2,281,995.23
  5. Step 5: Solve for x
    x = 2,281,995.23/1,688.00
  6. Step 6: Final answer
    x = 1,351.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.