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Finding the Fourth Proportional to 855.65, 1,181.18 and 524.21

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Solution

The fourth proportional to 855.65, 1,181.18 and 524.21 is: 723.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.65 : 1,181.18 = 524.21 : x
  2. Step 2: Convert to fraction form
    855.65/1,181.18 = 524.21/x
  3. Step 3: Cross multiply
    855.65x = 1,181.18 × 524.21
  4. Step 4: Simplify right side
    855.65x = 619,181.77
  5. Step 5: Solve for x
    x = 619,181.77/855.65
  6. Step 6: Final answer
    x = 723.64

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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.