Home / 1,310.16-1,964.96-385.79

Finding the Fourth Proportional to 1,310.16, 1,964.96 and 385.79

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Solution

The fourth proportional to 1,310.16, 1,964.96 and 385.79 is: 578.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.16 : 1,964.96 = 385.79 : x
  2. Step 2: Convert to fraction form
    1,310.16/1,964.96 = 385.79/x
  3. Step 3: Cross multiply
    1,310.16x = 1,964.96 × 385.79
  4. Step 4: Simplify right side
    1,310.16x = 758,051.61
  5. Step 5: Solve for x
    x = 758,051.61/1,310.16
  6. Step 6: Final answer
    x = 578.59

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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.