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Finding the Fourth Proportional to 1,918.87, 2,876.14 and 945.66

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Solution

The fourth proportional to 1,918.87, 2,876.14 and 945.66 is: 1,417.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.87 : 2,876.14 = 945.66 : x
  2. Step 2: Convert to fraction form
    1,918.87/2,876.14 = 945.66/x
  3. Step 3: Cross multiply
    1,918.87x = 2,876.14 × 945.66
  4. Step 4: Simplify right side
    1,918.87x = 2,719,850.55
  5. Step 5: Solve for x
    x = 2,719,850.55/1,918.87
  6. Step 6: Final answer
    x = 1,417.42

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1.5x scale

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.