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Finding the Fourth Proportional to 3,970.78, 5,955.20 and 1,337.60

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Solution

The fourth proportional to 3,970.78, 5,955.20 and 1,337.60 is: 2,006.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.78 : 5,955.20 = 1,337.60 : x
  2. Step 2: Convert to fraction form
    3,970.78/5,955.20 = 1,337.60/x
  3. Step 3: Cross multiply
    3,970.78x = 5,955.20 × 1,337.60
  4. Step 4: Simplify right side
    3,970.78x = 7,965,701.20
  5. Step 5: Solve for x
    x = 7,965,701.20/3,970.78
  6. Step 6: Final answer
    x = 2,006.08

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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.