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Finding the Fourth Proportional to 701.31, 1,051.46 and 330.91

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Solution

The fourth proportional to 701.31, 1,051.46 and 330.91 is: 496.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.31 : 1,051.46 = 330.91 : x
  2. Step 2: Convert to fraction form
    701.31/1,051.46 = 330.91/x
  3. Step 3: Cross multiply
    701.31x = 1,051.46 × 330.91
  4. Step 4: Simplify right side
    701.31x = 347,938.63
  5. Step 5: Solve for x
    x = 347,938.63/701.31
  6. Step 6: Final answer
    x = 496.13

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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.