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Finding the Fourth Proportional to 978,405.80, 1,467,608.70 and 862,932.20

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Solution

The fourth proportional to 978,405.80, 1,467,608.70 and 862,932.20 is: 1,294,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,405.80 : 1,467,608.70 = 862,932.20 : x
  2. Step 2: Convert to fraction form
    978,405.80/1,467,608.70 = 862,932.20/x
  3. Step 3: Cross multiply
    978,405.80x = 1,467,608.70 × 862,932.20
  4. Step 4: Simplify right side
    978,405.80x = 1,266,446,804,230.14
  5. Step 5: Solve for x
    x = 1,266,446,804,230.14/978,405.80
  6. Step 6: Final answer
    x = 1,294,398.30

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.