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Finding the Fourth Proportional to 1,997.76, 2,995.92 and 610.80

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Solution

The fourth proportional to 1,997.76, 2,995.92 and 610.80 is: 915.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,997.76 : 2,995.92 = 610.80 : x
  2. Step 2: Convert to fraction form
    1,997.76/2,995.92 = 610.80/x
  3. Step 3: Cross multiply
    1,997.76x = 2,995.92 × 610.80
  4. Step 4: Simplify right side
    1,997.76x = 1,829,907.94
  5. Step 5: Solve for x
    x = 1,829,907.94/1,997.76
  6. Step 6: Final answer
    x = 915.98

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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.