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Finding the Fourth Proportional to 647,239.40, 970,859.10 and 411,626.60

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Solution

The fourth proportional to 647,239.40, 970,859.10 and 411,626.60 is: 617,439.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,239.40 : 970,859.10 = 411,626.60 : x
  2. Step 2: Convert to fraction form
    647,239.40/970,859.10 = 411,626.60/x
  3. Step 3: Cross multiply
    647,239.40x = 970,859.10 × 411,626.60
  4. Step 4: Simplify right side
    647,239.40x = 399,631,430,412.06
  5. Step 5: Solve for x
    x = 399,631,430,412.06/647,239.40
  6. Step 6: Final answer
    x = 617,439.90

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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.