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Finding the Fourth Proportional to 399,078.95, 550,740.62 and 217,802.52

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Solution

The fourth proportional to 399,078.95, 550,740.62 and 217,802.52 is: 300,573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,078.95 : 550,740.62 = 217,802.52 : x
  2. Step 2: Convert to fraction form
    399,078.95/550,740.62 = 217,802.52/x
  3. Step 3: Cross multiply
    399,078.95x = 550,740.62 × 217,802.52
  4. Step 4: Simplify right side
    399,078.95x = 119,952,694,902.36
  5. Step 5: Solve for x
    x = 119,952,694,902.36/399,078.95
  6. Step 6: Final answer
    x = 300,573.85

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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.