Home / 428,622.24-642,960.09-113,079.45

Finding the Fourth Proportional to 428,622.24, 642,960.09 and 113,079.45

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Solution

The fourth proportional to 428,622.24, 642,960.09 and 113,079.45 is: 169,626.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,622.24 : 642,960.09 = 113,079.45 : x
  2. Step 2: Convert to fraction form
    428,622.24/642,960.09 = 113,079.45/x
  3. Step 3: Cross multiply
    428,622.24x = 642,960.09 × 113,079.45
  4. Step 4: Simplify right side
    428,622.24x = 72,705,573,349.15
  5. Step 5: Solve for x
    x = 72,705,573,349.15/428,622.24
  6. Step 6: Final answer
    x = 169,626.23

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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.