Home / 902,401.21-1,245,313.70-499,993.21

Finding the Fourth Proportional to 902,401.21, 1,245,313.70 and 499,993.21

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Solution

The fourth proportional to 902,401.21, 1,245,313.70 and 499,993.21 is: 689,990.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    902,401.21 : 1,245,313.70 = 499,993.21 : x
  2. Step 2: Convert to fraction form
    902,401.21/1,245,313.70 = 499,993.21/x
  3. Step 3: Cross multiply
    902,401.21x = 1,245,313.70 × 499,993.21
  4. Step 4: Simplify right side
    902,401.21x = 622,648,394,319.98
  5. Step 5: Solve for x
    x = 622,648,394,319.98/902,401.21
  6. Step 6: Final answer
    x = 689,990.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.