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Finding the Fourth Proportional to 978,400.80, 1,467,601.20 and 347,378.40

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Solution

The fourth proportional to 978,400.80, 1,467,601.20 and 347,378.40 is: 521,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,400.80 : 1,467,601.20 = 347,378.40 : x
  2. Step 2: Convert to fraction form
    978,400.80/1,467,601.20 = 347,378.40/x
  3. Step 3: Cross multiply
    978,400.80x = 1,467,601.20 × 347,378.40
  4. Step 4: Simplify right side
    978,400.80x = 509,812,956,694.08
  5. Step 5: Solve for x
    x = 509,812,956,694.08/978,400.80
  6. Step 6: Final answer
    x = 521,067.60

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Similar ratio
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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.