Home / 428,819.12-642,774.72-144,238.76

Finding the Fourth Proportional to 428,819.12, 642,774.72 and 144,238.76

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Solution

The fourth proportional to 428,819.12, 642,774.72 and 144,238.76 is: 216,205.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,819.12 : 642,774.72 = 144,238.76 : x
  2. Step 2: Convert to fraction form
    428,819.12/642,774.72 = 144,238.76/x
  3. Step 3: Cross multiply
    428,819.12x = 642,774.72 × 144,238.76
  4. Step 4: Simplify right side
    428,819.12x = 92,713,028,572.15
  5. Step 5: Solve for x
    x = 92,713,028,572.15/428,819.12
  6. Step 6: Final answer
    x = 216,205.44

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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.