Home / 428,047.20-643,453.20-304,245.60

Finding the Fourth Proportional to 428,047.20, 643,453.20 and 304,245.60

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Solution

The fourth proportional to 428,047.20, 643,453.20 and 304,245.60 is: 457,350.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,047.20 : 643,453.20 = 304,245.60 : x
  2. Step 2: Convert to fraction form
    428,047.20/643,453.20 = 304,245.60/x
  3. Step 3: Cross multiply
    428,047.20x = 643,453.20 × 304,245.60
  4. Step 4: Simplify right side
    428,047.20x = 195,767,804,905.92
  5. Step 5: Solve for x
    x = 195,767,804,905.92/428,047.20
  6. Step 6: Final answer
    x = 457,350.98

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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.