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Finding the Fourth Proportional to 918.33, 1,267.33 and 545.32

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Solution

The fourth proportional to 918.33, 1,267.33 and 545.32 is: 752.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.33 : 1,267.33 = 545.32 : x
  2. Step 2: Convert to fraction form
    918.33/1,267.33 = 545.32/x
  3. Step 3: Cross multiply
    918.33x = 1,267.33 × 545.32
  4. Step 4: Simplify right side
    918.33x = 691,100.40
  5. Step 5: Solve for x
    x = 691,100.40/918.33
  6. Step 6: Final answer
    x = 752.56

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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.