Home / 428,035.20-641,503.14-161,478.10

Finding the Fourth Proportional to 428,035.20, 641,503.14 and 161,478.10

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Solution

The fourth proportional to 428,035.20, 641,503.14 and 161,478.10 is: 242,009.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,035.20 : 641,503.14 = 161,478.10 : x
  2. Step 2: Convert to fraction form
    428,035.20/641,503.14 = 161,478.10/x
  3. Step 3: Cross multiply
    428,035.20x = 641,503.14 × 161,478.10
  4. Step 4: Simplify right side
    428,035.20x = 103,588,708,191.23
  5. Step 5: Solve for x
    x = 103,588,708,191.23/428,035.20
  6. Step 6: Final answer
    x = 242,009.79

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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.