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Finding the Fourth Proportional to 755.21, 1,124.94 and 745.49

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Solution

The fourth proportional to 755.21, 1,124.94 and 745.49 is: 1,110.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.21 : 1,124.94 = 745.49 : x
  2. Step 2: Convert to fraction form
    755.21/1,124.94 = 745.49/x
  3. Step 3: Cross multiply
    755.21x = 1,124.94 × 745.49
  4. Step 4: Simplify right side
    755.21x = 838,631.52
  5. Step 5: Solve for x
    x = 838,631.52/755.21
  6. Step 6: Final answer
    x = 1,110.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.