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Finding the Fourth Proportional to 762.84, 1,144.26 and 215.03

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Solution

The fourth proportional to 762.84, 1,144.26 and 215.03 is: 322.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.84 : 1,144.26 = 215.03 : x
  2. Step 2: Convert to fraction form
    762.84/1,144.26 = 215.03/x
  3. Step 3: Cross multiply
    762.84x = 1,144.26 × 215.03
  4. Step 4: Simplify right side
    762.84x = 246,050.23
  5. Step 5: Solve for x
    x = 246,050.23/762.84
  6. Step 6: Final answer
    x = 322.55

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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.