Home / 1,288.35-1,930.73-1,095.21

Finding the Fourth Proportional to 1,288.35, 1,930.73 and 1,095.21

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Solution

The fourth proportional to 1,288.35, 1,930.73 and 1,095.21 is: 1,641.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.35 : 1,930.73 = 1,095.21 : x
  2. Step 2: Convert to fraction form
    1,288.35/1,930.73 = 1,095.21/x
  3. Step 3: Cross multiply
    1,288.35x = 1,930.73 × 1,095.21
  4. Step 4: Simplify right side
    1,288.35x = 2,114,549.33
  5. Step 5: Solve for x
    x = 2,114,549.33/1,288.35
  6. Step 6: Final answer
    x = 1,641.28

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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.