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Finding the Fourth Proportional to 1,297,813.90, 1,946,720.85 and 766,372.90

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Solution

The fourth proportional to 1,297,813.90, 1,946,720.85 and 766,372.90 is: 1,149,559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,813.90 : 1,946,720.85 = 766,372.90 : x
  2. Step 2: Convert to fraction form
    1,297,813.90/1,946,720.85 = 766,372.90/x
  3. Step 3: Cross multiply
    1,297,813.90x = 1,946,720.85 × 766,372.90
  4. Step 4: Simplify right side
    1,297,813.90x = 1,491,914,103,304.97
  5. Step 5: Solve for x
    x = 1,491,914,103,304.97/1,297,813.90
  6. Step 6: Final answer
    x = 1,149,559.35

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Similar ratio
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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.