Home / 902,400.21-1,245,312.32-499,992.21

Finding the Fourth Proportional to 902,400.21, 1,245,312.32 and 499,992.21

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Solution

The fourth proportional to 902,400.21, 1,245,312.32 and 499,992.21 is: 689,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    902,400.21 : 1,245,312.32 = 499,992.21 : x
  2. Step 2: Convert to fraction form
    902,400.21/1,245,312.32 = 499,992.21/x
  3. Step 3: Cross multiply
    902,400.21x = 1,245,312.32 × 499,992.21
  4. Step 4: Simplify right side
    902,400.21x = 622,646,456,517.07
  5. Step 5: Solve for x
    x = 622,646,456,517.07/902,400.21
  6. Step 6: Final answer
    x = 689,989.26

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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.