Home / 2,159.20-3,236.64-858.88

Finding the Fourth Proportional to 2,159.20, 3,236.64 and 858.88

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Solution

The fourth proportional to 2,159.20, 3,236.64 and 858.88 is: 1,287.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159.20 : 3,236.64 = 858.88 : x
  2. Step 2: Convert to fraction form
    2,159.20/3,236.64 = 858.88/x
  3. Step 3: Cross multiply
    2,159.20x = 3,236.64 × 858.88
  4. Step 4: Simplify right side
    2,159.20x = 2,779,885.36
  5. Step 5: Solve for x
    x = 2,779,885.36/2,159.20
  6. Step 6: Final answer
    x = 1,287.46

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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.