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Finding the Fourth Proportional to 761.10, 1,141.10 and 395.66

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Solution

The fourth proportional to 761.10, 1,141.10 and 395.66 is: 593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.10 : 1,141.10 = 395.66 : x
  2. Step 2: Convert to fraction form
    761.10/1,141.10 = 395.66/x
  3. Step 3: Cross multiply
    761.10x = 1,141.10 × 395.66
  4. Step 4: Simplify right side
    761.10x = 451,487.63
  5. Step 5: Solve for x
    x = 451,487.63/761.10
  6. Step 6: Final answer
    x = 593.20

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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.