Home / 1,311.06-1,965.51-617.37

Finding the Fourth Proportional to 1,311.06, 1,965.51 and 617.37

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Solution

The fourth proportional to 1,311.06, 1,965.51 and 617.37 is: 925.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.06 : 1,965.51 = 617.37 : x
  2. Step 2: Convert to fraction form
    1,311.06/1,965.51 = 617.37/x
  3. Step 3: Cross multiply
    1,311.06x = 1,965.51 × 617.37
  4. Step 4: Simplify right side
    1,311.06x = 1,213,446.91
  5. Step 5: Solve for x
    x = 1,213,446.91/1,311.06
  6. Step 6: Final answer
    x = 925.55

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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.