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Finding the Fourth Proportional to 260,016.80, 390,025.20 and 218,026.40

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Solution

The fourth proportional to 260,016.80, 390,025.20 and 218,026.40 is: 327,039.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,016.80 : 390,025.20 = 218,026.40 : x
  2. Step 2: Convert to fraction form
    260,016.80/390,025.20 = 218,026.40/x
  3. Step 3: Cross multiply
    260,016.80x = 390,025.20 × 218,026.40
  4. Step 4: Simplify right side
    260,016.80x = 85,035,790,265.28
  5. Step 5: Solve for x
    x = 85,035,790,265.28/260,016.80
  6. Step 6: Final answer
    x = 327,039.60

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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.