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Finding the Fourth Proportional to 388,290.94, 582,576.58 and 135,608.64

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Solution

The fourth proportional to 388,290.94, 582,576.58 and 135,608.64 is: 203,461.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,290.94 : 582,576.58 = 135,608.64 : x
  2. Step 2: Convert to fraction form
    388,290.94/582,576.58 = 135,608.64/x
  3. Step 3: Cross multiply
    388,290.94x = 582,576.58 × 135,608.64
  4. Step 4: Simplify right side
    388,290.94x = 79,002,417,709.65
  5. Step 5: Solve for x
    x = 79,002,417,709.65/388,290.94
  6. Step 6: Final answer
    x = 203,461.91

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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.