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Finding the Fourth Proportional to 425,433.60, 638,668.80 and 422,323.20

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Solution

The fourth proportional to 425,433.60, 638,668.80 and 422,323.20 is: 633,999.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,433.60 : 638,668.80 = 422,323.20 : x
  2. Step 2: Convert to fraction form
    425,433.60/638,668.80 = 422,323.20/x
  3. Step 3: Cross multiply
    425,433.60x = 638,668.80 × 422,323.20
  4. Step 4: Simplify right side
    425,433.60x = 269,724,651,356.16
  5. Step 5: Solve for x
    x = 269,724,651,356.16/425,433.60
  6. Step 6: Final answer
    x = 633,999.41

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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.