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Finding the Fourth Proportional to 1,137.31, 1,705.51 and 675.21

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Solution

The fourth proportional to 1,137.31, 1,705.51 and 675.21 is: 1,012.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.31 : 1,705.51 = 675.21 : x
  2. Step 2: Convert to fraction form
    1,137.31/1,705.51 = 675.21/x
  3. Step 3: Cross multiply
    1,137.31x = 1,705.51 × 675.21
  4. Step 4: Simplify right side
    1,137.31x = 1,151,577.41
  5. Step 5: Solve for x
    x = 1,151,577.41/1,137.31
  6. Step 6: Final answer
    x = 1,012.54

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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.