Home / 3,215.19-4,814.87-2,656.48

Finding the Fourth Proportional to 3,215.19, 4,814.87 and 2,656.48

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Solution

The fourth proportional to 3,215.19, 4,814.87 and 2,656.48 is: 3,978.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.19 : 4,814.87 = 2,656.48 : x
  2. Step 2: Convert to fraction form
    3,215.19/4,814.87 = 2,656.48/x
  3. Step 3: Cross multiply
    3,215.19x = 4,814.87 × 2,656.48
  4. Step 4: Simplify right side
    3,215.19x = 12,790,605.86
  5. Step 5: Solve for x
    x = 12,790,605.86/3,215.19
  6. Step 6: Final answer
    x = 3,978.18

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1.5x scale

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.