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Finding the Fourth Proportional to 1,122.68, 1,683.68 and 537.38

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Solution

The fourth proportional to 1,122.68, 1,683.68 and 537.38 is: 805.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.68 : 1,683.68 = 537.38 : x
  2. Step 2: Convert to fraction form
    1,122.68/1,683.68 = 537.38/x
  3. Step 3: Cross multiply
    1,122.68x = 1,683.68 × 537.38
  4. Step 4: Simplify right side
    1,122.68x = 904,775.96
  5. Step 5: Solve for x
    x = 904,775.96/1,122.68
  6. Step 6: Final answer
    x = 805.91

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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.