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Finding the Fourth Proportional to 906.52, 1,356.89 and 721.84

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Solution

The fourth proportional to 906.52, 1,356.89 and 721.84 is: 1,080.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.52 : 1,356.89 = 721.84 : x
  2. Step 2: Convert to fraction form
    906.52/1,356.89 = 721.84/x
  3. Step 3: Cross multiply
    906.52x = 1,356.89 × 721.84
  4. Step 4: Simplify right side
    906.52x = 979,457.48
  5. Step 5: Solve for x
    x = 979,457.48/906.52
  6. Step 6: Final answer
    x = 1,080.46

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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.