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Finding the Fourth Proportional to 388,642.48, 582,846.08 and 135,875.86

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Solution

The fourth proportional to 388,642.48, 582,846.08 and 135,875.86 is: 203,772.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,642.48 : 582,846.08 = 135,875.86 : x
  2. Step 2: Convert to fraction form
    388,642.48/582,846.08 = 135,875.86/x
  3. Step 3: Cross multiply
    388,642.48x = 582,846.08 × 135,875.86
  4. Step 4: Simplify right side
    388,642.48x = 79,194,711,158.85
  5. Step 5: Solve for x
    x = 79,194,711,158.85/388,642.48
  6. Step 6: Final answer
    x = 203,772.66

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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.