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Finding the Fourth Proportional to 368,991.31, 553,661.92 and 219,526.87

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Solution

The fourth proportional to 368,991.31, 553,661.92 and 219,526.87 is: 329,394.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,991.31 : 553,661.92 = 219,526.87 : x
  2. Step 2: Convert to fraction form
    368,991.31/553,661.92 = 219,526.87/x
  3. Step 3: Cross multiply
    368,991.31x = 553,661.92 × 219,526.87
  4. Step 4: Simplify right side
    368,991.31x = 121,543,665,567.48
  5. Step 5: Solve for x
    x = 121,543,665,567.48/368,991.31
  6. Step 6: Final answer
    x = 329,394.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.