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Finding the Fourth Proportional to 388,433.53, 535,893.14 and 387,834.83

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Solution

The fourth proportional to 388,433.53, 535,893.14 and 387,834.83 is: 535,067.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,433.53 : 535,893.14 = 387,834.83 : x
  2. Step 2: Convert to fraction form
    388,433.53/535,893.14 = 387,834.83/x
  3. Step 3: Cross multiply
    388,433.53x = 535,893.14 × 387,834.83
  4. Step 4: Simplify right side
    388,433.53x = 207,838,027,073.40
  5. Step 5: Solve for x
    x = 207,838,027,073.40/388,433.53
  6. Step 6: Final answer
    x = 535,067.17

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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.