Home / 1,323.28-1,985.33-398.86

Finding the Fourth Proportional to 1,323.28, 1,985.33 and 398.86

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Solution

The fourth proportional to 1,323.28, 1,985.33 and 398.86 is: 598.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,323.28 : 1,985.33 = 398.86 : x
  2. Step 2: Convert to fraction form
    1,323.28/1,985.33 = 398.86/x
  3. Step 3: Cross multiply
    1,323.28x = 1,985.33 × 398.86
  4. Step 4: Simplify right side
    1,323.28x = 791,868.72
  5. Step 5: Solve for x
    x = 791,868.72/1,323.28
  6. Step 6: Final answer
    x = 598.41

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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.