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Finding the Fourth Proportional to 388,290.85, 582,519.44 and 219,890.77

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Solution

The fourth proportional to 388,290.85, 582,519.44 and 219,890.77 is: 329,883.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,290.85 : 582,519.44 = 219,890.77 : x
  2. Step 2: Convert to fraction form
    388,290.85/582,519.44 = 219,890.77/x
  3. Step 3: Cross multiply
    388,290.85x = 582,519.44 × 219,890.77
  4. Step 4: Simplify right side
    388,290.85x = 128,090,648,201.57
  5. Step 5: Solve for x
    x = 128,090,648,201.57/388,290.85
  6. Step 6: Final answer
    x = 329,883.25

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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.