Home / 428,760.03-643,145.48-162,449.01

Finding the Fourth Proportional to 428,760.03, 643,145.48 and 162,449.01

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Solution

The fourth proportional to 428,760.03, 643,145.48 and 162,449.01 is: 243,675.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,760.03 : 643,145.48 = 162,449.01 : x
  2. Step 2: Convert to fraction form
    428,760.03/643,145.48 = 162,449.01/x
  3. Step 3: Cross multiply
    428,760.03x = 643,145.48 × 162,449.01
  4. Step 4: Simplify right side
    428,760.03x = 104,478,345,699.73
  5. Step 5: Solve for x
    x = 104,478,345,699.73/428,760.03
  6. Step 6: Final answer
    x = 243,675.57

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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.