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Finding the Fourth Proportional to 388,124.16, 535,611.34 and 218,358.28

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Solution

The fourth proportional to 388,124.16, 535,611.34 and 218,358.28 is: 301,334.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,124.16 : 535,611.34 = 218,358.28 : x
  2. Step 2: Convert to fraction form
    388,124.16/535,611.34 = 218,358.28/x
  3. Step 3: Cross multiply
    388,124.16x = 535,611.34 × 218,358.28
  4. Step 4: Simplify right side
    388,124.16x = 116,955,170,665.09
  5. Step 5: Solve for x
    x = 116,955,170,665.09/388,124.16
  6. Step 6: Final answer
    x = 301,334.43

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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.