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Finding the Fourth Proportional to 1,713.38, 2,570.38 and 726.80

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Solution

The fourth proportional to 1,713.38, 2,570.38 and 726.80 is: 1,090.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,713.38 : 2,570.38 = 726.80 : x
  2. Step 2: Convert to fraction form
    1,713.38/2,570.38 = 726.80/x
  3. Step 3: Cross multiply
    1,713.38x = 2,570.38 × 726.80
  4. Step 4: Simplify right side
    1,713.38x = 1,868,152.18
  5. Step 5: Solve for x
    x = 1,868,152.18/1,713.38
  6. Step 6: Final answer
    x = 1,090.33

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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.