Home / 428,938.92-642,990.01-204,238.98

Finding the Fourth Proportional to 428,938.92, 642,990.01 and 204,238.98

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Solution

The fourth proportional to 428,938.92, 642,990.01 and 204,238.98 is: 306,159.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,938.92 : 642,990.01 = 204,238.98 : x
  2. Step 2: Convert to fraction form
    428,938.92/642,990.01 = 204,238.98/x
  3. Step 3: Cross multiply
    428,938.92x = 642,990.01 × 204,238.98
  4. Step 4: Simplify right side
    428,938.92x = 131,323,623,792.59
  5. Step 5: Solve for x
    x = 131,323,623,792.59/428,938.92
  6. Step 6: Final answer
    x = 306,159.26

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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.