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Finding the Fourth Proportional to 2,100.57, 3,150.86 and 561.57

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Solution

The fourth proportional to 2,100.57, 3,150.86 and 561.57 is: 842.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.57 : 3,150.86 = 561.57 : x
  2. Step 2: Convert to fraction form
    2,100.57/3,150.86 = 561.57/x
  3. Step 3: Cross multiply
    2,100.57x = 3,150.86 × 561.57
  4. Step 4: Simplify right side
    2,100.57x = 1,769,425.64
  5. Step 5: Solve for x
    x = 1,769,425.64/2,100.57
  6. Step 6: Final answer
    x = 842.36

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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.