Home / 1,228.01-1,838.56-921.29

Finding the Fourth Proportional to 1,228.01, 1,838.56 and 921.29

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Solution

The fourth proportional to 1,228.01, 1,838.56 and 921.29 is: 1,379.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.01 : 1,838.56 = 921.29 : x
  2. Step 2: Convert to fraction form
    1,228.01/1,838.56 = 921.29/x
  3. Step 3: Cross multiply
    1,228.01x = 1,838.56 × 921.29
  4. Step 4: Simplify right side
    1,228.01x = 1,693,846.94
  5. Step 5: Solve for x
    x = 1,693,846.94/1,228.01
  6. Step 6: Final answer
    x = 1,379.34

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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.