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Finding the Fourth Proportional to 2,040.78, 3,060.74 and 653.75

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Solution

The fourth proportional to 2,040.78, 3,060.74 and 653.75 is: 980.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,040.78 : 3,060.74 = 653.75 : x
  2. Step 2: Convert to fraction form
    2,040.78/3,060.74 = 653.75/x
  3. Step 3: Cross multiply
    2,040.78x = 3,060.74 × 653.75
  4. Step 4: Simplify right side
    2,040.78x = 2,000,956.58
  5. Step 5: Solve for x
    x = 2,000,956.58/2,040.78
  6. Step 6: Final answer
    x = 980.48

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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.