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Finding the Fourth Proportional to 388,254.39, 535,789.96 and 218,488.52

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Solution

The fourth proportional to 388,254.39, 535,789.96 and 218,488.52 is: 301,513.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,254.39 : 535,789.96 = 218,488.52 : x
  2. Step 2: Convert to fraction form
    388,254.39/535,789.96 = 218,488.52/x
  3. Step 3: Cross multiply
    388,254.39x = 535,789.96 × 218,488.52
  4. Step 4: Simplify right side
    388,254.39x = 117,063,955,391.26
  5. Step 5: Solve for x
    x = 117,063,955,391.26/388,254.39
  6. Step 6: Final answer
    x = 301,513.54

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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.