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Finding the Fourth Proportional to 401,117.76, 553,542.60 and 219,836.88

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Solution

The fourth proportional to 401,117.76, 553,542.60 and 219,836.88 is: 303,374.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,117.76 : 553,542.60 = 219,836.88 : x
  2. Step 2: Convert to fraction form
    401,117.76/553,542.60 = 219,836.88/x
  3. Step 3: Cross multiply
    401,117.76x = 553,542.60 × 219,836.88
  4. Step 4: Simplify right side
    401,117.76x = 121,689,078,131.09
  5. Step 5: Solve for x
    x = 121,689,078,131.09/401,117.76
  6. Step 6: Final answer
    x = 303,374.94

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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.