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Finding the Fourth Proportional to 388,315.48, 582,472.72 and 122,099.28

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Solution

The fourth proportional to 388,315.48, 582,472.72 and 122,099.28 is: 183,148.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,315.48 : 582,472.72 = 122,099.28 : x
  2. Step 2: Convert to fraction form
    388,315.48/582,472.72 = 122,099.28/x
  3. Step 3: Cross multiply
    388,315.48x = 582,472.72 × 122,099.28
  4. Step 4: Simplify right side
    388,315.48x = 71,119,499,731.64
  5. Step 5: Solve for x
    x = 71,119,499,731.64/388,315.48
  6. Step 6: Final answer
    x = 183,148.76

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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.