Home / 1,238.41-1,864.78-1,021.08

Finding the Fourth Proportional to 1,238.41, 1,864.78 and 1,021.08

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Solution

The fourth proportional to 1,238.41, 1,864.78 and 1,021.08 is: 1,537.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.41 : 1,864.78 = 1,021.08 : x
  2. Step 2: Convert to fraction form
    1,238.41/1,864.78 = 1,021.08/x
  3. Step 3: Cross multiply
    1,238.41x = 1,864.78 × 1,021.08
  4. Step 4: Simplify right side
    1,238.41x = 1,904,089.56
  5. Step 5: Solve for x
    x = 1,904,089.56/1,238.41
  6. Step 6: Final answer
    x = 1,537.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.