Home / 428,628.24-642,969.10-113,085.46

Finding the Fourth Proportional to 428,628.24, 642,969.10 and 113,085.46

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Solution

The fourth proportional to 428,628.24, 642,969.10 and 113,085.46 is: 169,635.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,628.24 : 642,969.10 = 113,085.46 : x
  2. Step 2: Convert to fraction form
    428,628.24/642,969.10 = 113,085.46/x
  3. Step 3: Cross multiply
    428,628.24x = 642,969.10 × 113,085.46
  4. Step 4: Simplify right side
    428,628.24x = 72,710,456,439.29
  5. Step 5: Solve for x
    x = 72,710,456,439.29/428,628.24
  6. Step 6: Final answer
    x = 169,635.24

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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.