Home / 1,020.94-1,531.41-443.81

Finding the Fourth Proportional to 1,020.94, 1,531.41 and 443.81

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Solution

The fourth proportional to 1,020.94, 1,531.41 and 443.81 is: 665.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.94 : 1,531.41 = 443.81 : x
  2. Step 2: Convert to fraction form
    1,020.94/1,531.41 = 443.81/x
  3. Step 3: Cross multiply
    1,020.94x = 1,531.41 × 443.81
  4. Step 4: Simplify right side
    1,020.94x = 679,657.24
  5. Step 5: Solve for x
    x = 679,657.24/1,020.94
  6. Step 6: Final answer
    x = 665.72

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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.