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Finding the Fourth Proportional to 305,260.70, 421,284.98 and 169,338.47

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Solution

The fourth proportional to 305,260.70, 421,284.98 and 169,338.47 is: 233,701.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,260.70 : 421,284.98 = 169,338.47 : x
  2. Step 2: Convert to fraction form
    305,260.70/421,284.98 = 169,338.47/x
  3. Step 3: Cross multiply
    305,260.70x = 421,284.98 × 169,338.47
  4. Step 4: Simplify right side
    305,260.70x = 71,339,751,892.39
  5. Step 5: Solve for x
    x = 71,339,751,892.39/305,260.70
  6. Step 6: Final answer
    x = 233,701.07

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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.