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Finding the Fourth Proportional to 665,193.70, 997,790.55 and 613,872.10

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Solution

The fourth proportional to 665,193.70, 997,790.55 and 613,872.10 is: 920,808.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,193.70 : 997,790.55 = 613,872.10 : x
  2. Step 2: Convert to fraction form
    665,193.70/997,790.55 = 613,872.10/x
  3. Step 3: Cross multiply
    665,193.70x = 997,790.55 × 613,872.10
  4. Step 4: Simplify right side
    665,193.70x = 612,515,780,288.66
  5. Step 5: Solve for x
    x = 612,515,780,288.66/665,193.70
  6. Step 6: Final answer
    x = 920,808.15

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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.