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Finding the Fourth Proportional to 1,351.02, 1,864.02 and 878.94

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Solution

The fourth proportional to 1,351.02, 1,864.02 and 878.94 is: 1,212.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.02 : 1,864.02 = 878.94 : x
  2. Step 2: Convert to fraction form
    1,351.02/1,864.02 = 878.94/x
  3. Step 3: Cross multiply
    1,351.02x = 1,864.02 × 878.94
  4. Step 4: Simplify right side
    1,351.02x = 1,638,361.74
  5. Step 5: Solve for x
    x = 1,638,361.74/1,351.02
  6. Step 6: Final answer
    x = 1,212.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.