Home / 1,324.16-1,985.80-399.44

Finding the Fourth Proportional to 1,324.16, 1,985.80 and 399.44

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Solution

The fourth proportional to 1,324.16, 1,985.80 and 399.44 is: 599.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.16 : 1,985.80 = 399.44 : x
  2. Step 2: Convert to fraction form
    1,324.16/1,985.80 = 399.44/x
  3. Step 3: Cross multiply
    1,324.16x = 1,985.80 × 399.44
  4. Step 4: Simplify right side
    1,324.16x = 793,207.95
  5. Step 5: Solve for x
    x = 793,207.95/1,324.16
  6. Step 6: Final answer
    x = 599.03

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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.