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Finding the Fourth Proportional to 215,101.60, 322,652.40 and 213,719.20

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Solution

The fourth proportional to 215,101.60, 322,652.40 and 213,719.20 is: 320,578.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,101.60 : 322,652.40 = 213,719.20 : x
  2. Step 2: Convert to fraction form
    215,101.60/322,652.40 = 213,719.20/x
  3. Step 3: Cross multiply
    215,101.60x = 322,652.40 × 213,719.20
  4. Step 4: Simplify right side
    215,101.60x = 68,957,012,806.08
  5. Step 5: Solve for x
    x = 68,957,012,806.08/215,101.60
  6. Step 6: Final answer
    x = 320,578.80

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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.