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Finding the Fourth Proportional to 378,633.39, 522,420.84 and 231,420.95

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Solution

The fourth proportional to 378,633.39, 522,420.84 and 231,420.95 is: 319,303.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,633.39 : 522,420.84 = 231,420.95 : x
  2. Step 2: Convert to fraction form
    378,633.39/522,420.84 = 231,420.95/x
  3. Step 3: Cross multiply
    378,633.39x = 522,420.84 × 231,420.95
  4. Step 4: Simplify right side
    378,633.39x = 120,899,126,439.57
  5. Step 5: Solve for x
    x = 120,899,126,439.57/378,633.39
  6. Step 6: Final answer
    x = 319,303.93

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1.5x scale

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.