Home / 1,689.67-2,329.07-1,191.52

Finding the Fourth Proportional to 1,689.67, 2,329.07 and 1,191.52

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Solution

The fourth proportional to 1,689.67, 2,329.07 and 1,191.52 is: 1,642.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,689.67 : 2,329.07 = 1,191.52 : x
  2. Step 2: Convert to fraction form
    1,689.67/2,329.07 = 1,191.52/x
  3. Step 3: Cross multiply
    1,689.67x = 2,329.07 × 1,191.52
  4. Step 4: Simplify right side
    1,689.67x = 2,775,130.64
  5. Step 5: Solve for x
    x = 2,775,130.64/1,689.67
  6. Step 6: Final answer
    x = 1,642.41

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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.