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Finding the Fourth Proportional to 3,056.78, 4,585.11 and 748.28

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Solution

The fourth proportional to 3,056.78, 4,585.11 and 748.28 is: 1,122.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,056.78 : 4,585.11 = 748.28 : x
  2. Step 2: Convert to fraction form
    3,056.78/4,585.11 = 748.28/x
  3. Step 3: Cross multiply
    3,056.78x = 4,585.11 × 748.28
  4. Step 4: Simplify right side
    3,056.78x = 3,430,946.11
  5. Step 5: Solve for x
    x = 3,430,946.11/3,056.78
  6. Step 6: Final answer
    x = 1,122.41

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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.