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Finding the Fourth Proportional to 978,281.80, 1,467,422.70 and 862,808.20

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Solution

The fourth proportional to 978,281.80, 1,467,422.70 and 862,808.20 is: 1,294,212.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,281.80 : 1,467,422.70 = 862,808.20 : x
  2. Step 2: Convert to fraction form
    978,281.80/1,467,422.70 = 862,808.20/x
  3. Step 3: Cross multiply
    978,281.80x = 1,467,422.70 × 862,808.20
  4. Step 4: Simplify right side
    978,281.80x = 1,266,104,338,426.14
  5. Step 5: Solve for x
    x = 1,266,104,338,426.14/978,281.80
  6. Step 6: Final answer
    x = 1,294,212.30

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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.