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Finding the Fourth Proportional to 401,358.02, 553,880.49 and 220,086.50

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Solution

The fourth proportional to 401,358.02, 553,880.49 and 220,086.50 is: 303,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,358.02 : 553,880.49 = 220,086.50 : x
  2. Step 2: Convert to fraction form
    401,358.02/553,880.49 = 220,086.50/x
  3. Step 3: Cross multiply
    401,358.02x = 553,880.49 × 220,086.50
  4. Step 4: Simplify right side
    401,358.02x = 121,901,618,462.39
  5. Step 5: Solve for x
    x = 121,901,618,462.39/401,358.02
  6. Step 6: Final answer
    x = 303,722.89

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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.