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Finding the Fourth Proportional to 978,158.40, 1,467,237.60 and 810,196.80

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Solution

The fourth proportional to 978,158.40, 1,467,237.60 and 810,196.80 is: 1,215,295.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,158.40 : 1,467,237.60 = 810,196.80 : x
  2. Step 2: Convert to fraction form
    978,158.40/1,467,237.60 = 810,196.80/x
  3. Step 3: Cross multiply
    978,158.40x = 1,467,237.60 × 810,196.80
  4. Step 4: Simplify right side
    978,158.40x = 1,188,751,208,359.68
  5. Step 5: Solve for x
    x = 1,188,751,208,359.68/978,158.40
  6. Step 6: Final answer
    x = 1,215,295.20

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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.