Home / 3,110.74-4,665.43-918.97

Finding the Fourth Proportional to 3,110.74, 4,665.43 and 918.97

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Solution

The fourth proportional to 3,110.74, 4,665.43 and 918.97 is: 1,378.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,110.74 : 4,665.43 = 918.97 : x
  2. Step 2: Convert to fraction form
    3,110.74/4,665.43 = 918.97/x
  3. Step 3: Cross multiply
    3,110.74x = 4,665.43 × 918.97
  4. Step 4: Simplify right side
    3,110.74x = 4,287,390.21
  5. Step 5: Solve for x
    x = 4,287,390.21/3,110.74
  6. Step 6: Final answer
    x = 1,378.25

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1.5x scale

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.