Home / 428,169.48-642,652.80-217,964.76

Finding the Fourth Proportional to 428,169.48, 642,652.80 and 217,964.76

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Solution

The fourth proportional to 428,169.48, 642,652.80 and 217,964.76 is: 327,150.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,169.48 : 642,652.80 = 217,964.76 : x
  2. Step 2: Convert to fraction form
    428,169.48/642,652.80 = 217,964.76/x
  3. Step 3: Cross multiply
    428,169.48x = 642,652.80 × 217,964.76
  4. Step 4: Simplify right side
    428,169.48x = 140,075,663,315.33
  5. Step 5: Solve for x
    x = 140,075,663,315.33/428,169.48
  6. Step 6: Final answer
    x = 327,150.04

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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.