Home / 1,314.38-1,971.30-620.66

Finding the Fourth Proportional to 1,314.38, 1,971.30 and 620.66

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Solution

The fourth proportional to 1,314.38, 1,971.30 and 620.66 is: 930.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,314.38 : 1,971.30 = 620.66 : x
  2. Step 2: Convert to fraction form
    1,314.38/1,971.30 = 620.66/x
  3. Step 3: Cross multiply
    1,314.38x = 1,971.30 × 620.66
  4. Step 4: Simplify right side
    1,314.38x = 1,223,507.06
  5. Step 5: Solve for x
    x = 1,223,507.06/1,314.38
  6. Step 6: Final answer
    x = 930.86

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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.