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Finding the Fourth Proportional to 399,968.43, 551,957.43 and 218,692.07

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Solution

The fourth proportional to 399,968.43, 551,957.43 and 218,692.07 is: 301,795.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,968.43 : 551,957.43 = 218,692.07 : x
  2. Step 2: Convert to fraction form
    399,968.43/551,957.43 = 218,692.07/x
  3. Step 3: Cross multiply
    399,968.43x = 551,957.43 × 218,692.07
  4. Step 4: Simplify right side
    399,968.43x = 120,708,710,158.79
  5. Step 5: Solve for x
    x = 120,708,710,158.79/399,968.43
  6. Step 6: Final answer
    x = 301,795.59

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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.