Home / 2,890.45-3,988.83-1,564.15

Finding the Fourth Proportional to 2,890.45, 3,988.83 and 1,564.15

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Solution

The fourth proportional to 2,890.45, 3,988.83 and 1,564.15 is: 2,158.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.45 : 3,988.83 = 1,564.15 : x
  2. Step 2: Convert to fraction form
    2,890.45/3,988.83 = 1,564.15/x
  3. Step 3: Cross multiply
    2,890.45x = 3,988.83 × 1,564.15
  4. Step 4: Simplify right side
    2,890.45x = 6,239,118.62
  5. Step 5: Solve for x
    x = 6,239,118.62/2,890.45
  6. Step 6: Final answer
    x = 2,158.53

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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.