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Finding the Fourth Proportional to 370,219.80, 555,912.90 and 212,755.80

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Solution

The fourth proportional to 370,219.80, 555,912.90 and 212,755.80 is: 319,468.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,219.80 : 555,912.90 = 212,755.80 : x
  2. Step 2: Convert to fraction form
    370,219.80/555,912.90 = 212,755.80/x
  3. Step 3: Cross multiply
    370,219.80x = 555,912.90 × 212,755.80
  4. Step 4: Simplify right side
    370,219.80x = 118,273,693,769.82
  5. Step 5: Solve for x
    x = 118,273,693,769.82/370,219.80
  6. Step 6: Final answer
    x = 319,468.85

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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.