Home / 1,020.47-1,408.19-572.36

Finding the Fourth Proportional to 1,020.47, 1,408.19 and 572.36

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Solution

The fourth proportional to 1,020.47, 1,408.19 and 572.36 is: 789.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.47 : 1,408.19 = 572.36 : x
  2. Step 2: Convert to fraction form
    1,020.47/1,408.19 = 572.36/x
  3. Step 3: Cross multiply
    1,020.47x = 1,408.19 × 572.36
  4. Step 4: Simplify right side
    1,020.47x = 805,981.73
  5. Step 5: Solve for x
    x = 805,981.73/1,020.47
  6. Step 6: Final answer
    x = 789.82

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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.