Home / 388,216.11-582,139.41-135,465.89

Finding the Fourth Proportional to 388,216.11, 582,139.41 and 135,465.89

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Solution

The fourth proportional to 388,216.11, 582,139.41 and 135,465.89 is: 203,134.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,216.11 : 582,139.41 = 135,465.89 : x
  2. Step 2: Convert to fraction form
    388,216.11/582,139.41 = 135,465.89/x
  3. Step 3: Cross multiply
    388,216.11x = 582,139.41 × 135,465.89
  4. Step 4: Simplify right side
    388,216.11x = 78,860,032,552.05
  5. Step 5: Solve for x
    x = 78,860,032,552.05/388,216.11
  6. Step 6: Final answer
    x = 203,134.36

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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.