Home / 2,891.16-3,989.80-1,564.86

Finding the Fourth Proportional to 2,891.16, 3,989.80 and 1,564.86

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Solution

The fourth proportional to 2,891.16, 3,989.80 and 1,564.86 is: 2,159.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.16 : 3,989.80 = 1,564.86 : x
  2. Step 2: Convert to fraction form
    2,891.16/3,989.80 = 1,564.86/x
  3. Step 3: Cross multiply
    2,891.16x = 3,989.80 × 1,564.86
  4. Step 4: Simplify right side
    2,891.16x = 6,243,478.43
  5. Step 5: Solve for x
    x = 6,243,478.43/2,891.16
  6. Step 6: Final answer
    x = 2,159.51

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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.