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Finding the Fourth Proportional to 428,841.60, 643,262.40 and 148,329.60

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Solution

The fourth proportional to 428,841.60, 643,262.40 and 148,329.60 is: 222,494.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,841.60 : 643,262.40 = 148,329.60 : x
  2. Step 2: Convert to fraction form
    428,841.60/643,262.40 = 148,329.60/x
  3. Step 3: Cross multiply
    428,841.60x = 643,262.40 × 148,329.60
  4. Step 4: Simplify right side
    428,841.60x = 95,414,854,487.04
  5. Step 5: Solve for x
    x = 95,414,854,487.04/428,841.60
  6. Step 6: Final answer
    x = 222,494.40

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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.