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Finding the Fourth Proportional to 1,567.95, 2,163.81 and 938.85

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Solution

The fourth proportional to 1,567.95, 2,163.81 and 938.85 is: 1,295.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,567.95 : 2,163.81 = 938.85 : x
  2. Step 2: Convert to fraction form
    1,567.95/2,163.81 = 938.85/x
  3. Step 3: Cross multiply
    1,567.95x = 2,163.81 × 938.85
  4. Step 4: Simplify right side
    1,567.95x = 2,031,493.02
  5. Step 5: Solve for x
    x = 2,031,493.02/1,567.95
  6. Step 6: Final answer
    x = 1,295.64

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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.