Home / 428,132.30-642,328.02-161,974.40

Finding the Fourth Proportional to 428,132.30, 642,328.02 and 161,974.40

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Solution

The fourth proportional to 428,132.30, 642,328.02 and 161,974.40 is: 243,010.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,132.30 : 642,328.02 = 161,974.40 : x
  2. Step 2: Convert to fraction form
    428,132.30/642,328.02 = 161,974.40/x
  3. Step 3: Cross multiply
    428,132.30x = 642,328.02 × 161,974.40
  4. Step 4: Simplify right side
    428,132.30x = 104,040,695,642.69
  5. Step 5: Solve for x
    x = 104,040,695,642.69/428,132.30
  6. Step 6: Final answer
    x = 243,010.62

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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.