Home / 378,981.27-522,990.95-209,211.75

Finding the Fourth Proportional to 378,981.27, 522,990.95 and 209,211.75

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Solution

The fourth proportional to 378,981.27, 522,990.95 and 209,211.75 is: 288,710.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,981.27 : 522,990.95 = 209,211.75 : x
  2. Step 2: Convert to fraction form
    378,981.27/522,990.95 = 209,211.75/x
  3. Step 3: Cross multiply
    378,981.27x = 522,990.95 × 209,211.75
  4. Step 4: Simplify right side
    378,981.27x = 109,415,850,837.60
  5. Step 5: Solve for x
    x = 109,415,850,837.60/378,981.27
  6. Step 6: Final answer
    x = 288,710.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.