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Finding the Fourth Proportional to 260,920.80, 390,214.80 and 218,930.40

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Solution

The fourth proportional to 260,920.80, 390,214.80 and 218,930.40 is: 327,416.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,920.80 : 390,214.80 = 218,930.40 : x
  2. Step 2: Convert to fraction form
    260,920.80/390,214.80 = 218,930.40/x
  3. Step 3: Cross multiply
    260,920.80x = 390,214.80 × 218,930.40
  4. Step 4: Simplify right side
    260,920.80x = 85,429,882,249.92
  5. Step 5: Solve for x
    x = 85,429,882,249.92/260,920.80
  6. Step 6: Final answer
    x = 327,416.91

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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.