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Finding the Fourth Proportional to 855.87, 1,180.98 and 482.86

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Solution

The fourth proportional to 855.87, 1,180.98 and 482.86 is: 666.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.87 : 1,180.98 = 482.86 : x
  2. Step 2: Convert to fraction form
    855.87/1,180.98 = 482.86/x
  3. Step 3: Cross multiply
    855.87x = 1,180.98 × 482.86
  4. Step 4: Simplify right side
    855.87x = 570,249.48
  5. Step 5: Solve for x
    x = 570,249.48/855.87
  6. Step 6: Final answer
    x = 666.28

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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.