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Finding the Fourth Proportional to 656.16, 984.80 and 381.87

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Solution

The fourth proportional to 656.16, 984.80 and 381.87 is: 573.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.16 : 984.80 = 381.87 : x
  2. Step 2: Convert to fraction form
    656.16/984.80 = 381.87/x
  3. Step 3: Cross multiply
    656.16x = 984.80 × 381.87
  4. Step 4: Simplify right side
    656.16x = 376,065.58
  5. Step 5: Solve for x
    x = 376,065.58/656.16
  6. Step 6: Final answer
    x = 573.13

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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.