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Finding the Fourth Proportional to 876,644.40, 1,314,966.60 and 864,834.60

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Solution

The fourth proportional to 876,644.40, 1,314,966.60 and 864,834.60 is: 1,297,251.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,644.40 : 1,314,966.60 = 864,834.60 : x
  2. Step 2: Convert to fraction form
    876,644.40/1,314,966.60 = 864,834.60/x
  3. Step 3: Cross multiply
    876,644.40x = 1,314,966.60 × 864,834.60
  4. Step 4: Simplify right side
    876,644.40x = 1,137,228,613,524.36
  5. Step 5: Solve for x
    x = 1,137,228,613,524.36/876,644.40
  6. Step 6: Final answer
    x = 1,297,251.90

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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.