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Finding the Fourth Proportional to 1,264.11, 1,895.65 and 745.15

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Solution

The fourth proportional to 1,264.11, 1,895.65 and 745.15 is: 1,117.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,264.11 : 1,895.65 = 745.15 : x
  2. Step 2: Convert to fraction form
    1,264.11/1,895.65 = 745.15/x
  3. Step 3: Cross multiply
    1,264.11x = 1,895.65 × 745.15
  4. Step 4: Simplify right side
    1,264.11x = 1,412,537.00
  5. Step 5: Solve for x
    x = 1,412,537.00/1,264.11
  6. Step 6: Final answer
    x = 1,117.42

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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.