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Finding the Fourth Proportional to 399,783.94, 551,700.51 and 218,495.82

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Solution

The fourth proportional to 399,783.94, 551,700.51 and 218,495.82 is: 301,523.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,783.94 : 551,700.51 = 218,495.82 : x
  2. Step 2: Convert to fraction form
    399,783.94/551,700.51 = 218,495.82/x
  3. Step 3: Cross multiply
    399,783.94x = 551,700.51 × 218,495.82
  4. Step 4: Simplify right side
    399,783.94x = 120,544,254,493.86
  5. Step 5: Solve for x
    x = 120,544,254,493.86/399,783.94
  6. Step 6: Final answer
    x = 301,523.51

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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.