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Finding the Fourth Proportional to 388,354.23, 582,671.61 and 135,672.03

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Solution

The fourth proportional to 388,354.23, 582,671.61 and 135,672.03 is: 203,557.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,354.23 : 582,671.61 = 135,672.03 : x
  2. Step 2: Convert to fraction form
    388,354.23/582,671.61 = 135,672.03/x
  3. Step 3: Cross multiply
    388,354.23x = 582,671.61 × 135,672.03
  4. Step 4: Simplify right side
    388,354.23x = 79,052,240,152.07
  5. Step 5: Solve for x
    x = 79,052,240,152.07/388,354.23
  6. Step 6: Final answer
    x = 203,557.05

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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.