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Finding the Fourth Proportional to 761.84, 1,142.76 and 214.03

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Solution

The fourth proportional to 761.84, 1,142.76 and 214.03 is: 321.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.84 : 1,142.76 = 214.03 : x
  2. Step 2: Convert to fraction form
    761.84/1,142.76 = 214.03/x
  3. Step 3: Cross multiply
    761.84x = 1,142.76 × 214.03
  4. Step 4: Simplify right side
    761.84x = 244,584.92
  5. Step 5: Solve for x
    x = 244,584.92/761.84
  6. Step 6: Final answer
    x = 321.05

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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.