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Finding the Fourth Proportional to 978,059.20, 1,467,015.90 and 409,293.40

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Solution

The fourth proportional to 978,059.20, 1,467,015.90 and 409,293.40 is: 613,909.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,059.20 : 1,467,015.90 = 409,293.40 : x
  2. Step 2: Convert to fraction form
    978,059.20/1,467,015.90 = 409,293.40/x
  3. Step 3: Cross multiply
    978,059.20x = 1,467,015.90 × 409,293.40
  4. Step 4: Simplify right side
    978,059.20x = 600,439,925,565.06
  5. Step 5: Solve for x
    x = 600,439,925,565.06/978,059.20
  6. Step 6: Final answer
    x = 613,909.59

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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.