Home / 1,320.12-1,812.11-1,169.46

Finding the Fourth Proportional to 1,320.12, 1,812.11 and 1,169.46

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Solution

The fourth proportional to 1,320.12, 1,812.11 and 1,169.46 is: 1,605.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.12 : 1,812.11 = 1,169.46 : x
  2. Step 2: Convert to fraction form
    1,320.12/1,812.11 = 1,169.46/x
  3. Step 3: Cross multiply
    1,320.12x = 1,812.11 × 1,169.46
  4. Step 4: Simplify right side
    1,320.12x = 2,119,184.31
  5. Step 5: Solve for x
    x = 2,119,184.31/1,320.12
  6. Step 6: Final answer
    x = 1,605.30

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.