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Finding the Fourth Proportional to 308,913.13, 426,173.43 and 187,957.45

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Solution

The fourth proportional to 308,913.13, 426,173.43 and 187,957.45 is: 259,304.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,913.13 : 426,173.43 = 187,957.45 : x
  2. Step 2: Convert to fraction form
    308,913.13/426,173.43 = 187,957.45/x
  3. Step 3: Cross multiply
    308,913.13x = 426,173.43 × 187,957.45
  4. Step 4: Simplify right side
    308,913.13x = 80,102,471,160.55
  5. Step 5: Solve for x
    x = 80,102,471,160.55/308,913.13
  6. Step 6: Final answer
    x = 259,304.20

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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.