Home / 1,351.05-1,866.20-1,105.35

Finding the Fourth Proportional to 1,351.05, 1,866.20 and 1,105.35

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Solution

The fourth proportional to 1,351.05, 1,866.20 and 1,105.35 is: 1,526.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.05 : 1,866.20 = 1,105.35 : x
  2. Step 2: Convert to fraction form
    1,351.05/1,866.20 = 1,105.35/x
  3. Step 3: Cross multiply
    1,351.05x = 1,866.20 × 1,105.35
  4. Step 4: Simplify right side
    1,351.05x = 2,062,798.64
  5. Step 5: Solve for x
    x = 2,062,798.64/1,351.05
  6. Step 6: Final answer
    x = 1,526.81

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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.