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Finding the Fourth Proportional to 716.89, 1,075.50 and 203.89

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Solution

The fourth proportional to 716.89, 1,075.50 and 203.89 is: 305.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.89 : 1,075.50 = 203.89 : x
  2. Step 2: Convert to fraction form
    716.89/1,075.50 = 203.89/x
  3. Step 3: Cross multiply
    716.89x = 1,075.50 × 203.89
  4. Step 4: Simplify right side
    716.89x = 219,283.70
  5. Step 5: Solve for x
    x = 219,283.70/716.89
  6. Step 6: Final answer
    x = 305.88

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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.