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Finding the Fourth Proportional to 1,423.87, 1,964.14 and 834.29

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Solution

The fourth proportional to 1,423.87, 1,964.14 and 834.29 is: 1,150.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.87 : 1,964.14 = 834.29 : x
  2. Step 2: Convert to fraction form
    1,423.87/1,964.14 = 834.29/x
  3. Step 3: Cross multiply
    1,423.87x = 1,964.14 × 834.29
  4. Step 4: Simplify right side
    1,423.87x = 1,638,652.54
  5. Step 5: Solve for x
    x = 1,638,652.54/1,423.87
  6. Step 6: Final answer
    x = 1,150.85

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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.