Home / 828,019.40-1,242,029.10-259,405.26

Finding the Fourth Proportional to 828,019.40, 1,242,029.10 and 259,405.26

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Solution

The fourth proportional to 828,019.40, 1,242,029.10 and 259,405.26 is: 389,107.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,019.40 : 1,242,029.10 = 259,405.26 : x
  2. Step 2: Convert to fraction form
    828,019.40/1,242,029.10 = 259,405.26/x
  3. Step 3: Cross multiply
    828,019.40x = 1,242,029.10 × 259,405.26
  4. Step 4: Simplify right side
    828,019.40x = 322,188,881,613.07
  5. Step 5: Solve for x
    x = 322,188,881,613.07/828,019.40
  6. Step 6: Final answer
    x = 389,107.89

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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.