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Finding the Fourth Proportional to 1,004.70, 1,513.90 and 826.10

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Solution

The fourth proportional to 1,004.70, 1,513.90 and 826.10 is: 1,244.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.70 : 1,513.90 = 826.10 : x
  2. Step 2: Convert to fraction form
    1,004.70/1,513.90 = 826.10/x
  3. Step 3: Cross multiply
    1,004.70x = 1,513.90 × 826.10
  4. Step 4: Simplify right side
    1,004.70x = 1,250,631.93
  5. Step 5: Solve for x
    x = 1,250,631.93/1,004.70
  6. Step 6: Final answer
    x = 1,244.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.