Home / 428,145.48-642,616.74-217,940.76

Finding the Fourth Proportional to 428,145.48, 642,616.74 and 217,940.76

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Solution

The fourth proportional to 428,145.48, 642,616.74 and 217,940.76 is: 327,114.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,145.48 : 642,616.74 = 217,940.76 : x
  2. Step 2: Convert to fraction form
    428,145.48/642,616.74 = 217,940.76/x
  3. Step 3: Cross multiply
    428,145.48x = 642,616.74 × 217,940.76
  4. Step 4: Simplify right side
    428,145.48x = 140,052,380,704.32
  5. Step 5: Solve for x
    x = 140,052,380,704.32/428,145.48
  6. Step 6: Final answer
    x = 327,114.00

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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.