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Finding the Fourth Proportional to 1,137.31, 1,705.42 and 650.23

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Solution

The fourth proportional to 1,137.31, 1,705.42 and 650.23 is: 975.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.31 : 1,705.42 = 650.23 : x
  2. Step 2: Convert to fraction form
    1,137.31/1,705.42 = 650.23/x
  3. Step 3: Cross multiply
    1,137.31x = 1,705.42 × 650.23
  4. Step 4: Simplify right side
    1,137.31x = 1,108,915.25
  5. Step 5: Solve for x
    x = 1,108,915.25/1,137.31
  6. Step 6: Final answer
    x = 975.03

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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.