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Finding the Fourth Proportional to 388,095.12, 582,216.68 and 135,447.77

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Solution

The fourth proportional to 388,095.12, 582,216.68 and 135,447.77 is: 203,197.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,095.12 : 582,216.68 = 135,447.77 : x
  2. Step 2: Convert to fraction form
    388,095.12/582,216.68 = 135,447.77/x
  3. Step 3: Cross multiply
    388,095.12x = 582,216.68 × 135,447.77
  4. Step 4: Simplify right side
    388,095.12x = 78,859,950,962.80
  5. Step 5: Solve for x
    x = 78,859,950,962.80/388,095.12
  6. Step 6: Final answer
    x = 203,197.48

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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.