Home / 2,811.64-4,217.40-1,521.28

Finding the Fourth Proportional to 2,811.64, 4,217.40 and 1,521.28

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Solution

The fourth proportional to 2,811.64, 4,217.40 and 1,521.28 is: 2,281.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.64 : 4,217.40 = 1,521.28 : x
  2. Step 2: Convert to fraction form
    2,811.64/4,217.40 = 1,521.28/x
  3. Step 3: Cross multiply
    2,811.64x = 4,217.40 × 1,521.28
  4. Step 4: Simplify right side
    2,811.64x = 6,415,846.27
  5. Step 5: Solve for x
    x = 6,415,846.27/2,811.64
  6. Step 6: Final answer
    x = 2,281.89

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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.