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Finding the Fourth Proportional to 399,853.73, 551,798.16 and 218,566.37

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Solution

The fourth proportional to 399,853.73, 551,798.16 and 218,566.37 is: 301,621.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,853.73 : 551,798.16 = 218,566.37 : x
  2. Step 2: Convert to fraction form
    399,853.73/551,798.16 = 218,566.37/x
  3. Step 3: Cross multiply
    399,853.73x = 551,798.16 × 218,566.37
  4. Step 4: Simplify right side
    399,853.73x = 120,604,520,803.88
  5. Step 5: Solve for x
    x = 120,604,520,803.88/399,853.73
  6. Step 6: Final answer
    x = 301,621.60

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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.