Home / 1,911.65-2,867.63-613.17

Finding the Fourth Proportional to 1,911.65, 2,867.63 and 613.17

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Solution

The fourth proportional to 1,911.65, 2,867.63 and 613.17 is: 919.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.65 : 2,867.63 = 613.17 : x
  2. Step 2: Convert to fraction form
    1,911.65/2,867.63 = 613.17/x
  3. Step 3: Cross multiply
    1,911.65x = 2,867.63 × 613.17
  4. Step 4: Simplify right side
    1,911.65x = 1,758,341.62
  5. Step 5: Solve for x
    x = 1,758,341.62/1,911.65
  6. Step 6: Final answer
    x = 919.81

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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.