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Finding the Fourth Proportional to 275,175.20, 412,762.80 and 212,890.40

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Solution

The fourth proportional to 275,175.20, 412,762.80 and 212,890.40 is: 319,335.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,175.20 : 412,762.80 = 212,890.40 : x
  2. Step 2: Convert to fraction form
    275,175.20/412,762.80 = 212,890.40/x
  3. Step 3: Cross multiply
    275,175.20x = 412,762.80 × 212,890.40
  4. Step 4: Simplify right side
    275,175.20x = 87,873,237,597.12
  5. Step 5: Solve for x
    x = 87,873,237,597.12/275,175.20
  6. Step 6: Final answer
    x = 319,335.60

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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.