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Finding the Fourth Proportional to 855.39, 1,180.34 and 482.36

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Solution

The fourth proportional to 855.39, 1,180.34 and 482.36 is: 665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.39 : 1,180.34 = 482.36 : x
  2. Step 2: Convert to fraction form
    855.39/1,180.34 = 482.36/x
  3. Step 3: Cross multiply
    855.39x = 1,180.34 × 482.36
  4. Step 4: Simplify right side
    855.39x = 569,348.80
  5. Step 5: Solve for x
    x = 569,348.80/855.39
  6. Step 6: Final answer
    x = 665.60

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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.