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Finding the Fourth Proportional to 388,299.84, 582,589.92 and 135,617.52

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Solution

The fourth proportional to 388,299.84, 582,589.92 and 135,617.52 is: 203,475.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,299.84 : 582,589.92 = 135,617.52 : x
  2. Step 2: Convert to fraction form
    388,299.84/582,589.92 = 135,617.52/x
  3. Step 3: Cross multiply
    388,299.84x = 582,589.92 × 135,617.52
  4. Step 4: Simplify right side
    388,299.84x = 79,009,400,127.40
  5. Step 5: Solve for x
    x = 79,009,400,127.40/388,299.84
  6. Step 6: Final answer
    x = 203,475.23

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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.