Home / 840,190.40-1,260,400.80-279,166.40

Finding the Fourth Proportional to 840,190.40, 1,260,400.80 and 279,166.40

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Solution

The fourth proportional to 840,190.40, 1,260,400.80 and 279,166.40 is: 418,787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,190.40 : 1,260,400.80 = 279,166.40 : x
  2. Step 2: Convert to fraction form
    840,190.40/1,260,400.80 = 279,166.40/x
  3. Step 3: Cross multiply
    840,190.40x = 1,260,400.80 × 279,166.40
  4. Step 4: Simplify right side
    840,190.40x = 351,861,553,893.12
  5. Step 5: Solve for x
    x = 351,861,553,893.12/840,190.40
  6. Step 6: Final answer
    x = 418,787.88

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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.