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Finding the Fourth Proportional to 1,890.46, 2,834.52 and 917.20

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Solution

The fourth proportional to 1,890.46, 2,834.52 and 917.20 is: 1,375.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.46 : 2,834.52 = 917.20 : x
  2. Step 2: Convert to fraction form
    1,890.46/2,834.52 = 917.20/x
  3. Step 3: Cross multiply
    1,890.46x = 2,834.52 × 917.20
  4. Step 4: Simplify right side
    1,890.46x = 2,599,821.74
  5. Step 5: Solve for x
    x = 2,599,821.74/1,890.46
  6. Step 6: Final answer
    x = 1,375.23

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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.