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Finding the Fourth Proportional to 904.75, 1,248.64 and 550.59

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Solution

The fourth proportional to 904.75, 1,248.64 and 550.59 is: 759.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.75 : 1,248.64 = 550.59 : x
  2. Step 2: Convert to fraction form
    904.75/1,248.64 = 550.59/x
  3. Step 3: Cross multiply
    904.75x = 1,248.64 × 550.59
  4. Step 4: Simplify right side
    904.75x = 687,488.70
  5. Step 5: Solve for x
    x = 687,488.70/904.75
  6. Step 6: Final answer
    x = 759.87

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.