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Finding the Fourth Proportional to 421,738.20, 632,607.30 and 403,536.60

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Solution

The fourth proportional to 421,738.20, 632,607.30 and 403,536.60 is: 605,304.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,738.20 : 632,607.30 = 403,536.60 : x
  2. Step 2: Convert to fraction form
    421,738.20/632,607.30 = 403,536.60/x
  3. Step 3: Cross multiply
    421,738.20x = 632,607.30 × 403,536.60
  4. Step 4: Simplify right side
    421,738.20x = 255,280,198,977.18
  5. Step 5: Solve for x
    x = 255,280,198,977.18/421,738.20
  6. Step 6: Final answer
    x = 605,304.90

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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.