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Finding the Fourth Proportional to 903.91, 1,355.49 and 556.73

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Solution

The fourth proportional to 903.91, 1,355.49 and 556.73 is: 834.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.91 : 1,355.49 = 556.73 : x
  2. Step 2: Convert to fraction form
    903.91/1,355.49 = 556.73/x
  3. Step 3: Cross multiply
    903.91x = 1,355.49 × 556.73
  4. Step 4: Simplify right side
    903.91x = 754,641.95
  5. Step 5: Solve for x
    x = 754,641.95/903.91
  6. Step 6: Final answer
    x = 834.86

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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.