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Finding the Fourth Proportional to 311,809.39, 430,309.52 and 174,000.37

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Solution

The fourth proportional to 311,809.39, 430,309.52 and 174,000.37 is: 240,127.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,809.39 : 430,309.52 = 174,000.37 : x
  2. Step 2: Convert to fraction form
    311,809.39/430,309.52 = 174,000.37/x
  3. Step 3: Cross multiply
    311,809.39x = 430,309.52 × 174,000.37
  4. Step 4: Simplify right side
    311,809.39x = 74,874,015,694.52
  5. Step 5: Solve for x
    x = 74,874,015,694.52/311,809.39
  6. Step 6: Final answer
    x = 240,127.52

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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.