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Finding the Fourth Proportional to 401,503.89, 554,076.15 and 220,217.31

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Solution

The fourth proportional to 401,503.89, 554,076.15 and 220,217.31 is: 303,900.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,503.89 : 554,076.15 = 220,217.31 : x
  2. Step 2: Convert to fraction form
    401,503.89/554,076.15 = 220,217.31/x
  3. Step 3: Cross multiply
    401,503.89x = 554,076.15 × 220,217.31
  4. Step 4: Simplify right side
    401,503.89x = 122,017,156,904.00
  5. Step 5: Solve for x
    x = 122,017,156,904.00/401,503.89
  6. Step 6: Final answer
    x = 303,900.31

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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.