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Finding the Fourth Proportional to 906.81, 1,359.46 and 290.13

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Solution

The fourth proportional to 906.81, 1,359.46 and 290.13 is: 434.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.81 : 1,359.46 = 290.13 : x
  2. Step 2: Convert to fraction form
    906.81/1,359.46 = 290.13/x
  3. Step 3: Cross multiply
    906.81x = 1,359.46 × 290.13
  4. Step 4: Simplify right side
    906.81x = 394,420.13
  5. Step 5: Solve for x
    x = 394,420.13/906.81
  6. Step 6: Final answer
    x = 434.95

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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.