Home / 807,381.76-1,211,100.48-427,789.12

Finding the Fourth Proportional to 807,381.76, 1,211,100.48 and 427,789.12

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Solution

The fourth proportional to 807,381.76, 1,211,100.48 and 427,789.12 is: 641,698.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,381.76 : 1,211,100.48 = 427,789.12 : x
  2. Step 2: Convert to fraction form
    807,381.76/1,211,100.48 = 427,789.12/x
  3. Step 3: Cross multiply
    807,381.76x = 1,211,100.48 × 427,789.12
  4. Step 4: Simplify right side
    807,381.76x = 518,095,608,570.78
  5. Step 5: Solve for x
    x = 518,095,608,570.78/807,381.76
  6. Step 6: Final answer
    x = 641,698.43

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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.