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Finding the Fourth Proportional to 903.23, 1,355.18 and 355.79

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Solution

The fourth proportional to 903.23, 1,355.18 and 355.79 is: 533.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.23 : 1,355.18 = 355.79 : x
  2. Step 2: Convert to fraction form
    903.23/1,355.18 = 355.79/x
  3. Step 3: Cross multiply
    903.23x = 1,355.18 × 355.79
  4. Step 4: Simplify right side
    903.23x = 482,150.94
  5. Step 5: Solve for x
    x = 482,150.94/903.23
  6. Step 6: Final answer
    x = 533.81

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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.