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Finding the Fourth Proportional to 388,252.17, 535,786.90 and 218,486.29

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Solution

The fourth proportional to 388,252.17, 535,786.90 and 218,486.29 is: 301,510.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,252.17 : 535,786.90 = 218,486.29 : x
  2. Step 2: Convert to fraction form
    388,252.17/535,786.90 = 218,486.29/x
  3. Step 3: Cross multiply
    388,252.17x = 535,786.90 × 218,486.29
  4. Step 4: Simplify right side
    388,252.17x = 117,062,092,011.60
  5. Step 5: Solve for x
    x = 117,062,092,011.60/388,252.17
  6. Step 6: Final answer
    x = 301,510.46

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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.