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Finding the Fourth Proportional to 870,003.60, 1,219,249.20 and 870,003.60

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Solution

The fourth proportional to 870,003.60, 1,219,249.20 and 870,003.60 is: 1,219,249.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,003.60 : 1,219,249.20 = 870,003.60 : x
  2. Step 2: Convert to fraction form
    870,003.60/1,219,249.20 = 870,003.60/x
  3. Step 3: Cross multiply
    870,003.60x = 1,219,249.20 × 870,003.60
  4. Step 4: Simplify right side
    870,003.60x = 1,060,751,193,297.12
  5. Step 5: Solve for x
    x = 1,060,751,193,297.12/870,003.60
  6. Step 6: Final answer
    x = 1,219,249.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.