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Finding the Fourth Proportional to 399,953.79, 551,930.36 and 218,666.43

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Solution

The fourth proportional to 399,953.79, 551,930.36 and 218,666.43 is: 301,756.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,953.79 : 551,930.36 = 218,666.43 : x
  2. Step 2: Convert to fraction form
    399,953.79/551,930.36 = 218,666.43/x
  3. Step 3: Cross multiply
    399,953.79x = 551,930.36 × 218,666.43
  4. Step 4: Simplify right side
    399,953.79x = 120,688,640,336.48
  5. Step 5: Solve for x
    x = 120,688,640,336.48/399,953.79
  6. Step 6: Final answer
    x = 301,756.46

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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.