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Finding the Fourth Proportional to 401,028, 553,418.64 and 239,889.84

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Solution

The fourth proportional to 401,028, 553,418.64 and 239,889.84 is: 331,047.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,028 : 553,418.64 = 239,889.84 : x
  2. Step 2: Convert to fraction form
    401,028/553,418.64 = 239,889.84/x
  3. Step 3: Cross multiply
    401,028x = 553,418.64 × 239,889.84
  4. Step 4: Simplify right side
    401,028x = 132,759,509,002.62
  5. Step 5: Solve for x
    x = 132,759,509,002.62/401,028
  6. Step 6: Final answer
    x = 331,047.98

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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.