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Finding the Fourth Proportional to 399,125.73, 550,802.21 and 217,838.37

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Solution

The fourth proportional to 399,125.73, 550,802.21 and 217,838.37 is: 300,621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,125.73 : 550,802.21 = 217,838.37 : x
  2. Step 2: Convert to fraction form
    399,125.73/550,802.21 = 217,838.37/x
  3. Step 3: Cross multiply
    399,125.73x = 550,802.21 × 217,838.37
  4. Step 4: Simplify right side
    399,125.73x = 119,985,854,529.61
  5. Step 5: Solve for x
    x = 119,985,854,529.61/399,125.73
  6. Step 6: Final answer
    x = 300,621.70

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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.