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Finding the Fourth Proportional to 217,812.40, 326,718.60 and 211,980.40

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Solution

The fourth proportional to 217,812.40, 326,718.60 and 211,980.40 is: 317,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,812.40 : 326,718.60 = 211,980.40 : x
  2. Step 2: Convert to fraction form
    217,812.40/326,718.60 = 211,980.40/x
  3. Step 3: Cross multiply
    217,812.40x = 326,718.60 × 211,980.40
  4. Step 4: Simplify right side
    217,812.40x = 69,257,939,515.44
  5. Step 5: Solve for x
    x = 69,257,939,515.44/217,812.40
  6. Step 6: Final answer
    x = 317,970.60

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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.