Home / 2,891.22-3,989.88-1,564.94

Finding the Fourth Proportional to 2,891.22, 3,989.88 and 1,564.94

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Solution

The fourth proportional to 2,891.22, 3,989.88 and 1,564.94 is: 2,159.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.22 : 3,989.88 = 1,564.94 : x
  2. Step 2: Convert to fraction form
    2,891.22/3,989.88 = 1,564.94/x
  3. Step 3: Cross multiply
    2,891.22x = 3,989.88 × 1,564.94
  4. Step 4: Simplify right side
    2,891.22x = 6,243,902.86
  5. Step 5: Solve for x
    x = 6,243,902.86/2,891.22
  6. Step 6: Final answer
    x = 2,159.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.