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Finding the Fourth Proportional to 275,165.20, 412,747.80 and 212,880.40

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Solution

The fourth proportional to 275,165.20, 412,747.80 and 212,880.40 is: 319,320.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,165.20 : 412,747.80 = 212,880.40 : x
  2. Step 2: Convert to fraction form
    275,165.20/412,747.80 = 212,880.40/x
  3. Step 3: Cross multiply
    275,165.20x = 412,747.80 × 212,880.40
  4. Step 4: Simplify right side
    275,165.20x = 87,865,916,763.12
  5. Step 5: Solve for x
    x = 87,865,916,763.12/275,165.20
  6. Step 6: Final answer
    x = 319,320.60

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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.