Home / 828,002.80-1,242,004.20-259,431.40

Finding the Fourth Proportional to 828,002.80, 1,242,004.20 and 259,431.40

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Solution

The fourth proportional to 828,002.80, 1,242,004.20 and 259,431.40 is: 389,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,002.80 : 1,242,004.20 = 259,431.40 : x
  2. Step 2: Convert to fraction form
    828,002.80/1,242,004.20 = 259,431.40/x
  3. Step 3: Cross multiply
    828,002.80x = 1,242,004.20 × 259,431.40
  4. Step 4: Simplify right side
    828,002.80x = 322,214,888,411.88
  5. Step 5: Solve for x
    x = 322,214,888,411.88/828,002.80
  6. Step 6: Final answer
    x = 389,147.10

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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.