Home / 3,111.60-4,667.40-1,864.20

Finding the Fourth Proportional to 3,111.60, 4,667.40 and 1,864.20

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Solution

The fourth proportional to 3,111.60, 4,667.40 and 1,864.20 is: 2,796.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.60 : 4,667.40 = 1,864.20 : x
  2. Step 2: Convert to fraction form
    3,111.60/4,667.40 = 1,864.20/x
  3. Step 3: Cross multiply
    3,111.60x = 4,667.40 × 1,864.20
  4. Step 4: Simplify right side
    3,111.60x = 8,700,967.08
  5. Step 5: Solve for x
    x = 8,700,967.08/3,111.60
  6. Step 6: Final answer
    x = 2,796.30

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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.