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Finding the Fourth Proportional to 906.63, 1,359.81 and 726.18

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Solution

The fourth proportional to 906.63, 1,359.81 and 726.18 is: 1,089.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.63 : 1,359.81 = 726.18 : x
  2. Step 2: Convert to fraction form
    906.63/1,359.81 = 726.18/x
  3. Step 3: Cross multiply
    906.63x = 1,359.81 × 726.18
  4. Step 4: Simplify right side
    906.63x = 987,466.83
  5. Step 5: Solve for x
    x = 987,466.83/906.63
  6. Step 6: Final answer
    x = 1,089.16

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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.