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Finding the Fourth Proportional to 2,792.19, 4,188.38 and 918.03

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Solution

The fourth proportional to 2,792.19, 4,188.38 and 918.03 is: 1,377.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.19 : 4,188.38 = 918.03 : x
  2. Step 2: Convert to fraction form
    2,792.19/4,188.38 = 918.03/x
  3. Step 3: Cross multiply
    2,792.19x = 4,188.38 × 918.03
  4. Step 4: Simplify right side
    2,792.19x = 3,845,053.90
  5. Step 5: Solve for x
    x = 3,845,053.90/2,792.19
  6. Step 6: Final answer
    x = 1,377.07

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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.