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Finding the Fourth Proportional to 492,440.80, 739,244.40 and 279,378.40

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Solution

The fourth proportional to 492,440.80, 739,244.40 and 279,378.40 is: 419,398.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,440.80 : 739,244.40 = 279,378.40 : x
  2. Step 2: Convert to fraction form
    492,440.80/739,244.40 = 279,378.40/x
  3. Step 3: Cross multiply
    492,440.80x = 739,244.40 × 279,378.40
  4. Step 4: Simplify right side
    492,440.80x = 206,528,917,680.96
  5. Step 5: Solve for x
    x = 206,528,917,680.96/492,440.80
  6. Step 6: Final answer
    x = 419,398.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.