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Finding the Fourth Proportional to 906.35, 1,359.65 and 290.07

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Solution

The fourth proportional to 906.35, 1,359.65 and 290.07 is: 435.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.35 : 1,359.65 = 290.07 : x
  2. Step 2: Convert to fraction form
    906.35/1,359.65 = 290.07/x
  3. Step 3: Cross multiply
    906.35x = 1,359.65 × 290.07
  4. Step 4: Simplify right side
    906.35x = 394,393.68
  5. Step 5: Solve for x
    x = 394,393.68/906.35
  6. Step 6: Final answer
    x = 435.15

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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.