Home / 1,310.96-1,966.19-386.56

Finding the Fourth Proportional to 1,310.96, 1,966.19 and 386.56

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Solution

The fourth proportional to 1,310.96, 1,966.19 and 386.56 is: 579.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.96 : 1,966.19 = 386.56 : x
  2. Step 2: Convert to fraction form
    1,310.96/1,966.19 = 386.56/x
  3. Step 3: Cross multiply
    1,310.96x = 1,966.19 × 386.56
  4. Step 4: Simplify right side
    1,310.96x = 760,050.41
  5. Step 5: Solve for x
    x = 760,050.41/1,310.96
  6. Step 6: Final answer
    x = 579.77

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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.