Home / 3,905.60-5,857.80-1,440.08

Finding the Fourth Proportional to 3,905.60, 5,857.80 and 1,440.08

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Solution

The fourth proportional to 3,905.60, 5,857.80 and 1,440.08 is: 2,159.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.60 : 5,857.80 = 1,440.08 : x
  2. Step 2: Convert to fraction form
    3,905.60/5,857.80 = 1,440.08/x
  3. Step 3: Cross multiply
    3,905.60x = 5,857.80 × 1,440.08
  4. Step 4: Simplify right side
    3,905.60x = 8,435,700.62
  5. Step 5: Solve for x
    x = 8,435,700.62/3,905.60
  6. Step 6: Final answer
    x = 2,159.90

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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.