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Finding the Fourth Proportional to 388,251.39, 535,785.82 and 218,485.52

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Solution

The fourth proportional to 388,251.39, 535,785.82 and 218,485.52 is: 301,509.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,251.39 : 535,785.82 = 218,485.52 : x
  2. Step 2: Convert to fraction form
    388,251.39/535,785.82 = 218,485.52/x
  3. Step 3: Cross multiply
    388,251.39x = 535,785.82 × 218,485.52
  4. Step 4: Simplify right side
    388,251.39x = 117,061,440,812.40
  5. Step 5: Solve for x
    x = 117,061,440,812.40/388,251.39
  6. Step 6: Final answer
    x = 301,509.39

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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.