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Finding the Fourth Proportional to 388,279.61, 535,825.48 and 218,517.38

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Solution

The fourth proportional to 388,279.61, 535,825.48 and 218,517.38 is: 301,553.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,279.61 : 535,825.48 = 218,517.38 : x
  2. Step 2: Convert to fraction form
    388,279.61/535,825.48 = 218,517.38/x
  3. Step 3: Cross multiply
    388,279.61x = 535,825.48 × 218,517.38
  4. Step 4: Simplify right side
    388,279.61x = 117,087,179,220.49
  5. Step 5: Solve for x
    x = 117,087,179,220.49/388,279.61
  6. Step 6: Final answer
    x = 301,553.77

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1.5x scale

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.