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Finding the Fourth Proportional to 1,423.98, 1,965.26 and 834.91

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Solution

The fourth proportional to 1,423.98, 1,965.26 and 834.91 is: 1,152.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.98 : 1,965.26 = 834.91 : x
  2. Step 2: Convert to fraction form
    1,423.98/1,965.26 = 834.91/x
  3. Step 3: Cross multiply
    1,423.98x = 1,965.26 × 834.91
  4. Step 4: Simplify right side
    1,423.98x = 1,640,812.40
  5. Step 5: Solve for x
    x = 1,640,812.40/1,423.98
  6. Step 6: Final answer
    x = 1,152.27

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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.