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Finding the Fourth Proportional to 421,618.20, 632,208.60 and 155,241.60

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Solution

The fourth proportional to 421,618.20, 632,208.60 and 155,241.60 is: 232,781.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,618.20 : 632,208.60 = 155,241.60 : x
  2. Step 2: Convert to fraction form
    421,618.20/632,208.60 = 155,241.60/x
  3. Step 3: Cross multiply
    421,618.20x = 632,208.60 × 155,241.60
  4. Step 4: Simplify right side
    421,618.20x = 98,145,074,597.76
  5. Step 5: Solve for x
    x = 98,145,074,597.76/421,618.20
  6. Step 6: Final answer
    x = 232,781.87

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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.