Home / 428,842.70-643,099.91-144,456.83

Finding the Fourth Proportional to 428,842.70, 643,099.91 and 144,456.83

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Solution

The fourth proportional to 428,842.70, 643,099.91 and 144,456.83 is: 216,629.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,842.70 : 643,099.91 = 144,456.83 : x
  2. Step 2: Convert to fraction form
    428,842.70/643,099.91 = 144,456.83/x
  3. Step 3: Cross multiply
    428,842.70x = 643,099.91 × 144,456.83
  4. Step 4: Simplify right side
    428,842.70x = 92,900,176,463.16
  5. Step 5: Solve for x
    x = 92,900,176,463.16/428,842.70
  6. Step 6: Final answer
    x = 216,629.96

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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.