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Finding the Fourth Proportional to 215,097.60, 322,646.40 and 213,715.20

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Solution

The fourth proportional to 215,097.60, 322,646.40 and 213,715.20 is: 320,572.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,097.60 : 322,646.40 = 213,715.20 : x
  2. Step 2: Convert to fraction form
    215,097.60/322,646.40 = 213,715.20/x
  3. Step 3: Cross multiply
    215,097.60x = 322,646.40 × 213,715.20
  4. Step 4: Simplify right side
    215,097.60x = 68,954,439,905.28
  5. Step 5: Solve for x
    x = 68,954,439,905.28/215,097.60
  6. Step 6: Final answer
    x = 320,572.80

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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.