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Finding the Fourth Proportional to 1,035.26, 1,428.03 and 755.15

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Solution

The fourth proportional to 1,035.26, 1,428.03 and 755.15 is: 1,041.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.26 : 1,428.03 = 755.15 : x
  2. Step 2: Convert to fraction form
    1,035.26/1,428.03 = 755.15/x
  3. Step 3: Cross multiply
    1,035.26x = 1,428.03 × 755.15
  4. Step 4: Simplify right side
    1,035.26x = 1,078,373.73
  5. Step 5: Solve for x
    x = 1,078,373.73/1,035.26
  6. Step 6: Final answer
    x = 1,041.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.