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Finding the Fourth Proportional to 906.04, 1,359.14 and 665.56

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Solution

The fourth proportional to 906.04, 1,359.14 and 665.56 is: 998.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.04 : 1,359.14 = 665.56 : x
  2. Step 2: Convert to fraction form
    906.04/1,359.14 = 665.56/x
  3. Step 3: Cross multiply
    906.04x = 1,359.14 × 665.56
  4. Step 4: Simplify right side
    906.04x = 904,589.22
  5. Step 5: Solve for x
    x = 904,589.22/906.04
  6. Step 6: Final answer
    x = 998.40

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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.