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Finding the Fourth Proportional to 217,878.20, 326,817.30 and 155,209.40

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Solution

The fourth proportional to 217,878.20, 326,817.30 and 155,209.40 is: 232,814.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,878.20 : 326,817.30 = 155,209.40 : x
  2. Step 2: Convert to fraction form
    217,878.20/326,817.30 = 155,209.40/x
  3. Step 3: Cross multiply
    217,878.20x = 326,817.30 × 155,209.40
  4. Step 4: Simplify right side
    217,878.20x = 50,725,117,042.62
  5. Step 5: Solve for x
    x = 50,725,117,042.62/217,878.20
  6. Step 6: Final answer
    x = 232,814.10

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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.