Home / 828,004.30-1,242,006.45-259,432.90

Finding the Fourth Proportional to 828,004.30, 1,242,006.45 and 259,432.90

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Solution

The fourth proportional to 828,004.30, 1,242,006.45 and 259,432.90 is: 389,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,004.30 : 1,242,006.45 = 259,432.90 : x
  2. Step 2: Convert to fraction form
    828,004.30/1,242,006.45 = 259,432.90/x
  3. Step 3: Cross multiply
    828,004.30x = 1,242,006.45 × 259,432.90
  4. Step 4: Simplify right side
    828,004.30x = 322,217,335,142.21
  5. Step 5: Solve for x
    x = 322,217,335,142.21/828,004.30
  6. Step 6: Final answer
    x = 389,149.35

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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.