Home / 428,901.30-643,157.55-162,573.30

Finding the Fourth Proportional to 428,901.30, 643,157.55 and 162,573.30

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Solution

The fourth proportional to 428,901.30, 643,157.55 and 162,573.30 is: 243,786.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,901.30 : 643,157.55 = 162,573.30 : x
  2. Step 2: Convert to fraction form
    428,901.30/643,157.55 = 162,573.30/x
  3. Step 3: Cross multiply
    428,901.30x = 643,157.55 × 162,573.30
  4. Step 4: Simplify right side
    428,901.30x = 104,560,245,323.42
  5. Step 5: Solve for x
    x = 104,560,245,323.42/428,901.30
  6. Step 6: Final answer
    x = 243,786.26

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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.