Home / 1,131,129.08-1,697,471.30-421,724.60

Finding the Fourth Proportional to 1,131,129.08, 1,697,471.30 and 421,724.60

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Solution

The fourth proportional to 1,131,129.08, 1,697,471.30 and 421,724.60 is: 632,876.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131,129.08 : 1,697,471.30 = 421,724.60 : x
  2. Step 2: Convert to fraction form
    1,131,129.08/1,697,471.30 = 421,724.60/x
  3. Step 3: Cross multiply
    1,131,129.08x = 1,697,471.30 × 421,724.60
  4. Step 4: Simplify right side
    1,131,129.08x = 715,865,405,003.98
  5. Step 5: Solve for x
    x = 715,865,405,003.98/1,131,129.08
  6. Step 6: Final answer
    x = 632,876.85

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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.