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Finding the Fourth Proportional to 379,073.44, 522,694.88 and 309,947.23

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Solution

The fourth proportional to 379,073.44, 522,694.88 and 309,947.23 is: 427,378.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,073.44 : 522,694.88 = 309,947.23 : x
  2. Step 2: Convert to fraction form
    379,073.44/522,694.88 = 309,947.23/x
  3. Step 3: Cross multiply
    379,073.44x = 522,694.88 × 309,947.23
  4. Step 4: Simplify right side
    379,073.44x = 162,007,827,334.71
  5. Step 5: Solve for x
    x = 162,007,827,334.71/379,073.44
  6. Step 6: Final answer
    x = 427,378.47

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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.