Home / 1,679.40-2,317.61-971.27

Finding the Fourth Proportional to 1,679.40, 2,317.61 and 971.27

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Solution

The fourth proportional to 1,679.40, 2,317.61 and 971.27 is: 1,340.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.40 : 2,317.61 = 971.27 : x
  2. Step 2: Convert to fraction form
    1,679.40/2,317.61 = 971.27/x
  3. Step 3: Cross multiply
    1,679.40x = 2,317.61 × 971.27
  4. Step 4: Simplify right side
    1,679.40x = 2,251,008.62
  5. Step 5: Solve for x
    x = 2,251,008.62/1,679.40
  6. Step 6: Final answer
    x = 1,340.36

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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.