Home / 830,403.80-1,245,605.70-269,438.30

Finding the Fourth Proportional to 830,403.80, 1,245,605.70 and 269,438.30

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Solution

The fourth proportional to 830,403.80, 1,245,605.70 and 269,438.30 is: 404,157.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,403.80 : 1,245,605.70 = 269,438.30 : x
  2. Step 2: Convert to fraction form
    830,403.80/1,245,605.70 = 269,438.30/x
  3. Step 3: Cross multiply
    830,403.80x = 1,245,605.70 × 269,438.30
  4. Step 4: Simplify right side
    830,403.80x = 335,613,882,278.31
  5. Step 5: Solve for x
    x = 335,613,882,278.31/830,403.80
  6. Step 6: Final answer
    x = 404,157.45

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.