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Finding the Fourth Proportional to 661,224.96, 991,232.64 and 287,112.96

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Solution

The fourth proportional to 661,224.96, 991,232.64 and 287,112.96 is: 430,406.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,224.96 : 991,232.64 = 287,112.96 : x
  2. Step 2: Convert to fraction form
    661,224.96/991,232.64 = 287,112.96/x
  3. Step 3: Cross multiply
    661,224.96x = 991,232.64 × 287,112.96
  4. Step 4: Simplify right side
    661,224.96x = 284,595,737,319.01
  5. Step 5: Solve for x
    x = 284,595,737,319.01/661,224.96
  6. Step 6: Final answer
    x = 430,406.83

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1.5x scale

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.