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Finding the Fourth Proportional to 421,630.20, 632,226.60 and 155,253.60

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Solution

The fourth proportional to 421,630.20, 632,226.60 and 155,253.60 is: 232,799.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,630.20 : 632,226.60 = 155,253.60 : x
  2. Step 2: Convert to fraction form
    421,630.20/632,226.60 = 155,253.60/x
  3. Step 3: Cross multiply
    421,630.20x = 632,226.60 × 155,253.60
  4. Step 4: Simplify right side
    421,630.20x = 98,155,455,665.76
  5. Step 5: Solve for x
    x = 98,155,455,665.76/421,630.20
  6. Step 6: Final answer
    x = 232,799.87

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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.