Home / 828,009.80-1,242,014.70-259,438.40

Finding the Fourth Proportional to 828,009.80, 1,242,014.70 and 259,438.40

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Solution

The fourth proportional to 828,009.80, 1,242,014.70 and 259,438.40 is: 389,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,009.80 : 1,242,014.70 = 259,438.40 : x
  2. Step 2: Convert to fraction form
    828,009.80/1,242,014.70 = 259,438.40/x
  3. Step 3: Cross multiply
    828,009.80x = 1,242,014.70 × 259,438.40
  4. Step 4: Simplify right side
    828,009.80x = 322,226,306,544.48
  5. Step 5: Solve for x
    x = 322,226,306,544.48/828,009.80
  6. Step 6: Final answer
    x = 389,157.60

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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.