Home / 1,280.93-1,921.33-356.41

Finding the Fourth Proportional to 1,280.93, 1,921.33 and 356.41

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Solution

The fourth proportional to 1,280.93, 1,921.33 and 356.41 is: 534.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.93 : 1,921.33 = 356.41 : x
  2. Step 2: Convert to fraction form
    1,280.93/1,921.33 = 356.41/x
  3. Step 3: Cross multiply
    1,280.93x = 1,921.33 × 356.41
  4. Step 4: Simplify right side
    1,280.93x = 684,775.53
  5. Step 5: Solve for x
    x = 684,775.53/1,280.93
  6. Step 6: Final answer
    x = 534.59

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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.