Home / 428,995.28-643,110.54-162,942.63

Finding the Fourth Proportional to 428,995.28, 643,110.54 and 162,942.63

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Solution

The fourth proportional to 428,995.28, 643,110.54 and 162,942.63 is: 244,268.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,995.28 : 643,110.54 = 162,942.63 : x
  2. Step 2: Convert to fraction form
    428,995.28/643,110.54 = 162,942.63/x
  3. Step 3: Cross multiply
    428,995.28x = 643,110.54 × 162,942.63
  4. Step 4: Simplify right side
    428,995.28x = 104,790,121,953.61
  5. Step 5: Solve for x
    x = 104,790,121,953.61/428,995.28
  6. Step 6: Final answer
    x = 244,268.70

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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.