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Finding the Fourth Proportional to 217,998.90, 326,998.35 and 155,013.30

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Solution

The fourth proportional to 217,998.90, 326,998.35 and 155,013.30 is: 232,519.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,998.90 : 326,998.35 = 155,013.30 : x
  2. Step 2: Convert to fraction form
    217,998.90/326,998.35 = 155,013.30/x
  3. Step 3: Cross multiply
    217,998.90x = 326,998.35 × 155,013.30
  4. Step 4: Simplify right side
    217,998.90x = 50,689,093,328.06
  5. Step 5: Solve for x
    x = 50,689,093,328.06/217,998.90
  6. Step 6: Final answer
    x = 232,519.95

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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.