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Finding the Fourth Proportional to 392,674.32, 588,591 and 155,688.72

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Solution

The fourth proportional to 392,674.32, 588,591 and 155,688.72 is: 233,366.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,674.32 : 588,591 = 155,688.72 : x
  2. Step 2: Convert to fraction form
    392,674.32/588,591 = 155,688.72/x
  3. Step 3: Cross multiply
    392,674.32x = 588,591 × 155,688.72
  4. Step 4: Simplify right side
    392,674.32x = 91,636,979,393.52
  5. Step 5: Solve for x
    x = 91,636,979,393.52/392,674.32
  6. Step 6: Final answer
    x = 233,366.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.