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Finding the Fourth Proportional to 761.85, 1,050.90 and 481.59

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Solution

The fourth proportional to 761.85, 1,050.90 and 481.59 is: 664.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.85 : 1,050.90 = 481.59 : x
  2. Step 2: Convert to fraction form
    761.85/1,050.90 = 481.59/x
  3. Step 3: Cross multiply
    761.85x = 1,050.90 × 481.59
  4. Step 4: Simplify right side
    761.85x = 506,102.93
  5. Step 5: Solve for x
    x = 506,102.93/761.85
  6. Step 6: Final answer
    x = 664.31

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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.