Home / 1,351.47-2,026.83-857.15

Finding the Fourth Proportional to 1,351.47, 2,026.83 and 857.15

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Solution

The fourth proportional to 1,351.47, 2,026.83 and 857.15 is: 1,285.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351.47 : 2,026.83 = 857.15 : x
  2. Step 2: Convert to fraction form
    1,351.47/2,026.83 = 857.15/x
  3. Step 3: Cross multiply
    1,351.47x = 2,026.83 × 857.15
  4. Step 4: Simplify right side
    1,351.47x = 1,737,287.20
  5. Step 5: Solve for x
    x = 1,737,287.20/1,351.47
  6. Step 6: Final answer
    x = 1,285.48

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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.