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Finding the Fourth Proportional to 715.25, 1,072.88 and 202.25

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Solution

The fourth proportional to 715.25, 1,072.88 and 202.25 is: 303.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.25 : 1,072.88 = 202.25 : x
  2. Step 2: Convert to fraction form
    715.25/1,072.88 = 202.25/x
  3. Step 3: Cross multiply
    715.25x = 1,072.88 × 202.25
  4. Step 4: Simplify right side
    715.25x = 216,989.98
  5. Step 5: Solve for x
    x = 216,989.98/715.25
  6. Step 6: Final answer
    x = 303.38

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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.