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Finding the Fourth Proportional to 388,126.80, 535,592.52 and 218,350.80

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Solution

The fourth proportional to 388,126.80, 535,592.52 and 218,350.80 is: 301,311.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,126.80 : 535,592.52 = 218,350.80 : x
  2. Step 2: Convert to fraction form
    388,126.80/535,592.52 = 218,350.80/x
  3. Step 3: Cross multiply
    388,126.80x = 535,592.52 × 218,350.80
  4. Step 4: Simplify right side
    388,126.80x = 116,947,055,216.02
  5. Step 5: Solve for x
    x = 116,947,055,216.02/388,126.80
  6. Step 6: Final answer
    x = 301,311.47

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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.