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Finding the Fourth Proportional to 3,260.78, 4,885.02 and 1,615.40

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Solution

The fourth proportional to 3,260.78, 4,885.02 and 1,615.40 is: 2,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,260.78 : 4,885.02 = 1,615.40 : x
  2. Step 2: Convert to fraction form
    3,260.78/4,885.02 = 1,615.40/x
  3. Step 3: Cross multiply
    3,260.78x = 4,885.02 × 1,615.40
  4. Step 4: Simplify right side
    3,260.78x = 7,891,261.31
  5. Step 5: Solve for x
    x = 7,891,261.31/3,260.78
  6. Step 6: Final answer
    x = 2,420.05

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1.5x scale

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.