Home / 345,863.20-518,794.80-212,310.40

Finding the Fourth Proportional to 345,863.20, 518,794.80 and 212,310.40

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Solution

The fourth proportional to 345,863.20, 518,794.80 and 212,310.40 is: 318,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,863.20 : 518,794.80 = 212,310.40 : x
  2. Step 2: Convert to fraction form
    345,863.20/518,794.80 = 212,310.40/x
  3. Step 3: Cross multiply
    345,863.20x = 518,794.80 × 212,310.40
  4. Step 4: Simplify right side
    345,863.20x = 110,145,531,505.92
  5. Step 5: Solve for x
    x = 110,145,531,505.92/345,863.20
  6. Step 6: Final answer
    x = 318,465.60

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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.