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Finding the Fourth Proportional to 290,396.48, 400,745.60 and 163,083.20

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Solution

The fourth proportional to 290,396.48, 400,745.60 and 163,083.20 is: 225,053.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,396.48 : 400,745.60 = 163,083.20 : x
  2. Step 2: Convert to fraction form
    290,396.48/400,745.60 = 163,083.20/x
  3. Step 3: Cross multiply
    290,396.48x = 400,745.60 × 163,083.20
  4. Step 4: Simplify right side
    290,396.48x = 65,354,874,833.92
  5. Step 5: Solve for x
    x = 65,354,874,833.92/290,396.48
  6. Step 6: Final answer
    x = 225,053.95

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1.5x scale

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.