Home / 1,675.11-2,311.68-929.09

Finding the Fourth Proportional to 1,675.11, 2,311.68 and 929.09

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Solution

The fourth proportional to 1,675.11, 2,311.68 and 929.09 is: 1,282.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,675.11 : 2,311.68 = 929.09 : x
  2. Step 2: Convert to fraction form
    1,675.11/2,311.68 = 929.09/x
  3. Step 3: Cross multiply
    1,675.11x = 2,311.68 × 929.09
  4. Step 4: Simplify right side
    1,675.11x = 2,147,747.21
  5. Step 5: Solve for x
    x = 2,147,747.21/1,675.11
  6. Step 6: Final answer
    x = 1,282.15

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1.5x scale

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.