Home / 2,890.77-3,989.22-1,564.46

Finding the Fourth Proportional to 2,890.77, 3,989.22 and 1,564.46

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Solution

The fourth proportional to 2,890.77, 3,989.22 and 1,564.46 is: 2,158.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.77 : 3,989.22 = 1,564.46 : x
  2. Step 2: Convert to fraction form
    2,890.77/3,989.22 = 1,564.46/x
  3. Step 3: Cross multiply
    2,890.77x = 3,989.22 × 1,564.46
  4. Step 4: Simplify right side
    2,890.77x = 6,240,955.18
  5. Step 5: Solve for x
    x = 6,240,955.18/2,890.77
  6. Step 6: Final answer
    x = 2,158.92

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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.