Home / 1,021.03-1,409.05-578.95

Finding the Fourth Proportional to 1,021.03, 1,409.05 and 578.95

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Solution

The fourth proportional to 1,021.03, 1,409.05 and 578.95 is: 798.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.03 : 1,409.05 = 578.95 : x
  2. Step 2: Convert to fraction form
    1,021.03/1,409.05 = 578.95/x
  3. Step 3: Cross multiply
    1,021.03x = 1,409.05 × 578.95
  4. Step 4: Simplify right side
    1,021.03x = 815,766.70
  5. Step 5: Solve for x
    x = 815,766.70/1,021.03
  6. Step 6: Final answer
    x = 798.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.