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Finding the Fourth Proportional to 1,958.05, 2,934.94 and 917.40

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Solution

The fourth proportional to 1,958.05, 2,934.94 and 917.40 is: 1,375.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.05 : 2,934.94 = 917.40 : x
  2. Step 2: Convert to fraction form
    1,958.05/2,934.94 = 917.40/x
  3. Step 3: Cross multiply
    1,958.05x = 2,934.94 × 917.40
  4. Step 4: Simplify right side
    1,958.05x = 2,692,513.96
  5. Step 5: Solve for x
    x = 2,692,513.96/1,958.05
  6. Step 6: Final answer
    x = 1,375.10

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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.