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Finding the Fourth Proportional to 855.87, 1,181.18 and 482.93

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Solution

The fourth proportional to 855.87, 1,181.18 and 482.93 is: 666.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.87 : 1,181.18 = 482.93 : x
  2. Step 2: Convert to fraction form
    855.87/1,181.18 = 482.93/x
  3. Step 3: Cross multiply
    855.87x = 1,181.18 × 482.93
  4. Step 4: Simplify right side
    855.87x = 570,427.26
  5. Step 5: Solve for x
    x = 570,427.26/855.87
  6. Step 6: Final answer
    x = 666.49

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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.