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Finding the Fourth Proportional to 761.86, 1,141.35 and 675.46

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Solution

The fourth proportional to 761.86, 1,141.35 and 675.46 is: 1,011.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.86 : 1,141.35 = 675.46 : x
  2. Step 2: Convert to fraction form
    761.86/1,141.35 = 675.46/x
  3. Step 3: Cross multiply
    761.86x = 1,141.35 × 675.46
  4. Step 4: Simplify right side
    761.86x = 770,936.27
  5. Step 5: Solve for x
    x = 770,936.27/761.86
  6. Step 6: Final answer
    x = 1,011.91

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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.