Home / 428,194.32-642,306.06-203,438.76

Finding the Fourth Proportional to 428,194.32, 642,306.06 and 203,438.76

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Solution

The fourth proportional to 428,194.32, 642,306.06 and 203,438.76 is: 305,165.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,194.32 : 642,306.06 = 203,438.76 : x
  2. Step 2: Convert to fraction form
    428,194.32/642,306.06 = 203,438.76/x
  3. Step 3: Cross multiply
    428,194.32x = 642,306.06 × 203,438.76
  4. Step 4: Simplify right side
    428,194.32x = 130,669,948,386.89
  5. Step 5: Solve for x
    x = 130,669,948,386.89/428,194.32
  6. Step 6: Final answer
    x = 305,165.07

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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.