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Finding the Fourth Proportional to 978,439.80, 1,467,659.70 and 646,015.80

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Solution

The fourth proportional to 978,439.80, 1,467,659.70 and 646,015.80 is: 969,023.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,439.80 : 1,467,659.70 = 646,015.80 : x
  2. Step 2: Convert to fraction form
    978,439.80/1,467,659.70 = 646,015.80/x
  3. Step 3: Cross multiply
    978,439.80x = 1,467,659.70 × 646,015.80
  4. Step 4: Simplify right side
    978,439.80x = 948,131,355,223.26
  5. Step 5: Solve for x
    x = 948,131,355,223.26/978,439.80
  6. Step 6: Final answer
    x = 969,023.70

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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.