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Finding the Fourth Proportional to 413,626.60, 620,439.90 and 147,687.40

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Solution

The fourth proportional to 413,626.60, 620,439.90 and 147,687.40 is: 221,531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,626.60 : 620,439.90 = 147,687.40 : x
  2. Step 2: Convert to fraction form
    413,626.60/620,439.90 = 147,687.40/x
  3. Step 3: Cross multiply
    413,626.60x = 620,439.90 × 147,687.40
  4. Step 4: Simplify right side
    413,626.60x = 91,631,155,687.26
  5. Step 5: Solve for x
    x = 91,631,155,687.26/413,626.60
  6. Step 6: Final answer
    x = 221,531.10

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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.