Home / 821,124.27-1,231,720.62-281,751.38

Finding the Fourth Proportional to 821,124.27, 1,231,720.62 and 281,751.38

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Solution

The fourth proportional to 821,124.27, 1,231,720.62 and 281,751.38 is: 422,638.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,124.27 : 1,231,720.62 = 281,751.38 : x
  2. Step 2: Convert to fraction form
    821,124.27/1,231,720.62 = 281,751.38/x
  3. Step 3: Cross multiply
    821,124.27x = 1,231,720.62 × 281,751.38
  4. Step 4: Simplify right side
    821,124.27x = 347,038,985,848.16
  5. Step 5: Solve for x
    x = 347,038,985,848.16/821,124.27
  6. Step 6: Final answer
    x = 422,638.81

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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.