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Finding the Fourth Proportional to 853.57, 1,279.45 and 366.99

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Solution

The fourth proportional to 853.57, 1,279.45 and 366.99 is: 550.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.57 : 1,279.45 = 366.99 : x
  2. Step 2: Convert to fraction form
    853.57/1,279.45 = 366.99/x
  3. Step 3: Cross multiply
    853.57x = 1,279.45 × 366.99
  4. Step 4: Simplify right side
    853.57x = 469,545.36
  5. Step 5: Solve for x
    x = 469,545.36/853.57
  6. Step 6: Final answer
    x = 550.10

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1.5x scale

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.