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Finding the Fourth Proportional to 655.58, 989.63 and 651.94

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Solution

The fourth proportional to 655.58, 989.63 and 651.94 is: 984.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.58 : 989.63 = 651.94 : x
  2. Step 2: Convert to fraction form
    655.58/989.63 = 651.94/x
  3. Step 3: Cross multiply
    655.58x = 989.63 × 651.94
  4. Step 4: Simplify right side
    655.58x = 645,179.38
  5. Step 5: Solve for x
    x = 645,179.38/655.58
  6. Step 6: Final answer
    x = 984.14

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.