Home / 428,816.52-643,134.48-276,557.52

Finding the Fourth Proportional to 428,816.52, 643,134.48 and 276,557.52

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Solution

The fourth proportional to 428,816.52, 643,134.48 and 276,557.52 is: 414,778.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,816.52 : 643,134.48 = 276,557.52 : x
  2. Step 2: Convert to fraction form
    428,816.52/643,134.48 = 276,557.52/x
  3. Step 3: Cross multiply
    428,816.52x = 643,134.48 × 276,557.52
  4. Step 4: Simplify right side
    428,816.52x = 177,863,676,815.29
  5. Step 5: Solve for x
    x = 177,863,676,815.29/428,816.52
  6. Step 6: Final answer
    x = 414,778.04

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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.