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Finding the Fourth Proportional to 309,245.31, 426,319.44 and 227,428.95

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Solution

The fourth proportional to 309,245.31, 426,319.44 and 227,428.95 is: 313,529.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,245.31 : 426,319.44 = 227,428.95 : x
  2. Step 2: Convert to fraction form
    309,245.31/426,319.44 = 227,428.95/x
  3. Step 3: Cross multiply
    309,245.31x = 426,319.44 × 227,428.95
  4. Step 4: Simplify right side
    309,245.31x = 96,957,382,603.79
  5. Step 5: Solve for x
    x = 96,957,382,603.79/309,245.31
  6. Step 6: Final answer
    x = 313,529.03

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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.