Home / 428,631.60-642,974.13-113,088.81

Finding the Fourth Proportional to 428,631.60, 642,974.13 and 113,088.81

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Solution

The fourth proportional to 428,631.60, 642,974.13 and 113,088.81 is: 169,640.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,631.60 : 642,974.13 = 113,088.81 : x
  2. Step 2: Convert to fraction form
    428,631.60/642,974.13 = 113,088.81/x
  3. Step 3: Cross multiply
    428,631.60x = 642,974.13 × 113,088.81
  4. Step 4: Simplify right side
    428,631.60x = 72,713,179,222.49
  5. Step 5: Solve for x
    x = 72,713,179,222.49/428,631.60
  6. Step 6: Final answer
    x = 169,640.27

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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.