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Finding the Fourth Proportional to 648,616.60, 970,592.10 and 438,664.60

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Solution

The fourth proportional to 648,616.60, 970,592.10 and 438,664.60 is: 656,419.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,616.60 : 970,592.10 = 438,664.60 : x
  2. Step 2: Convert to fraction form
    648,616.60/970,592.10 = 438,664.60/x
  3. Step 3: Cross multiply
    648,616.60x = 970,592.10 × 438,664.60
  4. Step 4: Simplify right side
    648,616.60x = 425,764,395,309.66
  5. Step 5: Solve for x
    x = 425,764,395,309.66/648,616.60
  6. Step 6: Final answer
    x = 656,419.21

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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.