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Finding the Fourth Proportional to 918.89, 1,377.48 and 333.75

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Solution

The fourth proportional to 918.89, 1,377.48 and 333.75 is: 500.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.89 : 1,377.48 = 333.75 : x
  2. Step 2: Convert to fraction form
    918.89/1,377.48 = 333.75/x
  3. Step 3: Cross multiply
    918.89x = 1,377.48 × 333.75
  4. Step 4: Simplify right side
    918.89x = 459,733.95
  5. Step 5: Solve for x
    x = 459,733.95/918.89
  6. Step 6: Final answer
    x = 500.32

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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.