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Finding the Fourth Proportional to 388,355.07, 582,672.33 and 135,672.74

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Solution

The fourth proportional to 388,355.07, 582,672.33 and 135,672.74 is: 203,557.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,355.07 : 582,672.33 = 135,672.74 : x
  2. Step 2: Convert to fraction form
    388,355.07/582,672.33 = 135,672.74/x
  3. Step 3: Cross multiply
    388,355.07x = 582,672.33 × 135,672.74
  4. Step 4: Simplify right side
    388,355.07x = 79,052,748,619.92
  5. Step 5: Solve for x
    x = 79,052,748,619.92/388,355.07
  6. Step 6: Final answer
    x = 203,557.92

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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.