Home / 1,310.66-1,966.26-386.25

Finding the Fourth Proportional to 1,310.66, 1,966.26 and 386.25

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Solution

The fourth proportional to 1,310.66, 1,966.26 and 386.25 is: 579.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.66 : 1,966.26 = 386.25 : x
  2. Step 2: Convert to fraction form
    1,310.66/1,966.26 = 386.25/x
  3. Step 3: Cross multiply
    1,310.66x = 1,966.26 × 386.25
  4. Step 4: Simplify right side
    1,310.66x = 759,467.93
  5. Step 5: Solve for x
    x = 759,467.93/1,310.66
  6. Step 6: Final answer
    x = 579.45

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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.