Home / 386,929.78-533,963.08-217,163.90

Finding the Fourth Proportional to 386,929.78, 533,963.08 and 217,163.90

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Solution

The fourth proportional to 386,929.78, 533,963.08 and 217,163.90 is: 299,686.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,929.78 : 533,963.08 = 217,163.90 : x
  2. Step 2: Convert to fraction form
    386,929.78/533,963.08 = 217,163.90/x
  3. Step 3: Cross multiply
    386,929.78x = 533,963.08 × 217,163.90
  4. Step 4: Simplify right side
    386,929.78x = 115,957,504,908.81
  5. Step 5: Solve for x
    x = 115,957,504,908.81/386,929.78
  6. Step 6: Final answer
    x = 299,686.17

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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.