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Finding the Fourth Proportional to 2,487.78, 3,731.91 and 927.41

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Solution

The fourth proportional to 2,487.78, 3,731.91 and 927.41 is: 1,391.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.78 : 3,731.91 = 927.41 : x
  2. Step 2: Convert to fraction form
    2,487.78/3,731.91 = 927.41/x
  3. Step 3: Cross multiply
    2,487.78x = 3,731.91 × 927.41
  4. Step 4: Simplify right side
    2,487.78x = 3,461,016.51
  5. Step 5: Solve for x
    x = 3,461,016.51/2,487.78
  6. Step 6: Final answer
    x = 1,391.21

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1.5x scale

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.