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Finding the Fourth Proportional to 870,474.80, 1,305,712.20 and 807,489.20

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Solution

The fourth proportional to 870,474.80, 1,305,712.20 and 807,489.20 is: 1,211,233.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,474.80 : 1,305,712.20 = 807,489.20 : x
  2. Step 2: Convert to fraction form
    870,474.80/1,305,712.20 = 807,489.20/x
  3. Step 3: Cross multiply
    870,474.80x = 1,305,712.20 × 807,489.20
  4. Step 4: Simplify right side
    870,474.80x = 1,054,348,499,808.24
  5. Step 5: Solve for x
    x = 1,054,348,499,808.24/870,474.80
  6. Step 6: Final answer
    x = 1,211,233.80

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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.