Home / 3,490.40-5,235.60-2,615.60

Finding the Fourth Proportional to 3,490.40, 5,235.60 and 2,615.60

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Solution

The fourth proportional to 3,490.40, 5,235.60 and 2,615.60 is: 3,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.40 : 5,235.60 = 2,615.60 : x
  2. Step 2: Convert to fraction form
    3,490.40/5,235.60 = 2,615.60/x
  3. Step 3: Cross multiply
    3,490.40x = 5,235.60 × 2,615.60
  4. Step 4: Simplify right side
    3,490.40x = 13,694,235.36
  5. Step 5: Solve for x
    x = 13,694,235.36/3,490.40
  6. Step 6: Final answer
    x = 3,923.40

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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.