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Finding the Fourth Proportional to 401,269.17, 553,736.60 and 217,503.79

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Solution

The fourth proportional to 401,269.17, 553,736.60 and 217,503.79 is: 300,147.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,269.17 : 553,736.60 = 217,503.79 : x
  2. Step 2: Convert to fraction form
    401,269.17/553,736.60 = 217,503.79/x
  3. Step 3: Cross multiply
    401,269.17x = 553,736.60 × 217,503.79
  4. Step 4: Simplify right side
    401,269.17x = 120,439,810,286.34
  5. Step 5: Solve for x
    x = 120,439,810,286.34/401,269.17
  6. Step 6: Final answer
    x = 300,147.18

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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.