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Finding the Fourth Proportional to 401,397.78, 553,928.58 and 220,112.58

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Solution

The fourth proportional to 401,397.78, 553,928.58 and 220,112.58 is: 303,755.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,397.78 : 553,928.58 = 220,112.58 : x
  2. Step 2: Convert to fraction form
    401,397.78/553,928.58 = 220,112.58/x
  3. Step 3: Cross multiply
    401,397.78x = 553,928.58 × 220,112.58
  4. Step 4: Simplify right side
    401,397.78x = 121,926,648,879.54
  5. Step 5: Solve for x
    x = 121,926,648,879.54/401,397.78
  6. Step 6: Final answer
    x = 303,755.16

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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.