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Finding the Fourth Proportional to 1,297,201.50, 1,789,622.64 and 866,799.90

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Solution

The fourth proportional to 1,297,201.50, 1,789,622.64 and 866,799.90 is: 1,195,839.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,201.50 : 1,789,622.64 = 866,799.90 : x
  2. Step 2: Convert to fraction form
    1,297,201.50/1,789,622.64 = 866,799.90/x
  3. Step 3: Cross multiply
    1,297,201.50x = 1,789,622.64 × 866,799.90
  4. Step 4: Simplify right side
    1,297,201.50x = 1,551,244,725,389.74
  5. Step 5: Solve for x
    x = 1,551,244,725,389.74/1,297,201.50
  6. Step 6: Final answer
    x = 1,195,839.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.