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Finding the Fourth Proportional to 387,043.68, 534,083.76 and 217,244.64

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Solution

The fourth proportional to 387,043.68, 534,083.76 and 217,244.64 is: 299,777.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,043.68 : 534,083.76 = 217,244.64 : x
  2. Step 2: Convert to fraction form
    387,043.68/534,083.76 = 217,244.64/x
  3. Step 3: Cross multiply
    387,043.68x = 534,083.76 × 217,244.64
  4. Step 4: Simplify right side
    387,043.68x = 116,026,834,171.05
  5. Step 5: Solve for x
    x = 116,026,834,171.05/387,043.68
  6. Step 6: Final answer
    x = 299,777.11

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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.