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Finding the Fourth Proportional to 1,276.50, 1,914.63 and 410.82

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Solution

The fourth proportional to 1,276.50, 1,914.63 and 410.82 is: 616.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.50 : 1,914.63 = 410.82 : x
  2. Step 2: Convert to fraction form
    1,276.50/1,914.63 = 410.82/x
  3. Step 3: Cross multiply
    1,276.50x = 1,914.63 × 410.82
  4. Step 4: Simplify right side
    1,276.50x = 786,568.30
  5. Step 5: Solve for x
    x = 786,568.30/1,276.50
  6. Step 6: Final answer
    x = 616.19

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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.