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Finding the Fourth Proportional to 2,792.97, 4,189.94 and 918.36

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Solution

The fourth proportional to 2,792.97, 4,189.94 and 918.36 is: 1,377.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.97 : 4,189.94 = 918.36 : x
  2. Step 2: Convert to fraction form
    2,792.97/4,189.94 = 918.36/x
  3. Step 3: Cross multiply
    2,792.97x = 4,189.94 × 918.36
  4. Step 4: Simplify right side
    2,792.97x = 3,847,868.71
  5. Step 5: Solve for x
    x = 3,847,868.71/2,792.97
  6. Step 6: Final answer
    x = 1,377.70

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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.