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Finding the Fourth Proportional to 399,088.95, 550,722.51 and 217,799.43

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Solution

The fourth proportional to 399,088.95, 550,722.51 and 217,799.43 is: 300,552.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,088.95 : 550,722.51 = 217,799.43 : x
  2. Step 2: Convert to fraction form
    399,088.95/550,722.51 = 217,799.43/x
  3. Step 3: Cross multiply
    399,088.95x = 550,722.51 × 217,799.43
  4. Step 4: Simplify right side
    399,088.95x = 119,947,048,766.17
  5. Step 5: Solve for x
    x = 119,947,048,766.17/399,088.95
  6. Step 6: Final answer
    x = 300,552.17

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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.