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Finding the Fourth Proportional to 401,135.05, 553,247.46 and 340,905.07

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Solution

The fourth proportional to 401,135.05, 553,247.46 and 340,905.07 is: 470,177.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,135.05 : 553,247.46 = 340,905.07 : x
  2. Step 2: Convert to fraction form
    401,135.05/553,247.46 = 340,905.07/x
  3. Step 3: Cross multiply
    401,135.05x = 553,247.46 × 340,905.07
  4. Step 4: Simplify right side
    401,135.05x = 188,604,864,078.62
  5. Step 5: Solve for x
    x = 188,604,864,078.62/401,135.05
  6. Step 6: Final answer
    x = 470,177.97

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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.