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Finding the Fourth Proportional to 1,122.56, 1,683.68 and 353.04

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Solution

The fourth proportional to 1,122.56, 1,683.68 and 353.04 is: 529.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.56 : 1,683.68 = 353.04 : x
  2. Step 2: Convert to fraction form
    1,122.56/1,683.68 = 353.04/x
  3. Step 3: Cross multiply
    1,122.56x = 1,683.68 × 353.04
  4. Step 4: Simplify right side
    1,122.56x = 594,406.39
  5. Step 5: Solve for x
    x = 594,406.39/1,122.56
  6. Step 6: Final answer
    x = 529.51

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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.