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Finding the Fourth Proportional to 903.39, 1,355.54 and 355.96

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Solution

The fourth proportional to 903.39, 1,355.54 and 355.96 is: 534.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.39 : 1,355.54 = 355.96 : x
  2. Step 2: Convert to fraction form
    903.39/1,355.54 = 355.96/x
  3. Step 3: Cross multiply
    903.39x = 1,355.54 × 355.96
  4. Step 4: Simplify right side
    903.39x = 482,517.93
  5. Step 5: Solve for x
    x = 482,517.93/903.39
  6. Step 6: Final answer
    x = 534.12

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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.