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Finding the Fourth Proportional to 872.33, 1,203.75 and 499.32

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Solution

The fourth proportional to 872.33, 1,203.75 and 499.32 is: 689.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.33 : 1,203.75 = 499.32 : x
  2. Step 2: Convert to fraction form
    872.33/1,203.75 = 499.32/x
  3. Step 3: Cross multiply
    872.33x = 1,203.75 × 499.32
  4. Step 4: Simplify right side
    872.33x = 601,056.45
  5. Step 5: Solve for x
    x = 601,056.45/872.33
  6. Step 6: Final answer
    x = 689.03

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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.