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Finding the Fourth Proportional to 918.24, 1,267.17 and 540.05

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Solution

The fourth proportional to 918.24, 1,267.17 and 540.05 is: 745.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.24 : 1,267.17 = 540.05 : x
  2. Step 2: Convert to fraction form
    918.24/1,267.17 = 540.05/x
  3. Step 3: Cross multiply
    918.24x = 1,267.17 × 540.05
  4. Step 4: Simplify right side
    918.24x = 684,335.44
  5. Step 5: Solve for x
    x = 684,335.44/918.24
  6. Step 6: Final answer
    x = 745.26

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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.