Home / 428,654.28-642,579.11-144,145.89

Finding the Fourth Proportional to 428,654.28, 642,579.11 and 144,145.89

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Solution

The fourth proportional to 428,654.28, 642,579.11 and 144,145.89 is: 216,083.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,654.28 : 642,579.11 = 144,145.89 : x
  2. Step 2: Convert to fraction form
    428,654.28/642,579.11 = 144,145.89/x
  3. Step 3: Cross multiply
    428,654.28x = 642,579.11 × 144,145.89
  4. Step 4: Simplify right side
    428,654.28x = 92,625,139,673.17
  5. Step 5: Solve for x
    x = 92,625,139,673.17/428,654.28
  6. Step 6: Final answer
    x = 216,083.56

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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.