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Finding the Fourth Proportional to 761.66, 1,050.81 and 481.79

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Solution

The fourth proportional to 761.66, 1,050.81 and 481.79 is: 664.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.66 : 1,050.81 = 481.79 : x
  2. Step 2: Convert to fraction form
    761.66/1,050.81 = 481.79/x
  3. Step 3: Cross multiply
    761.66x = 1,050.81 × 481.79
  4. Step 4: Simplify right side
    761.66x = 506,264.50
  5. Step 5: Solve for x
    x = 506,264.50/761.66
  6. Step 6: Final answer
    x = 664.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.