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Finding the Fourth Proportional to 275,806.80, 380,219.40 and 185,000.40

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Solution

The fourth proportional to 275,806.80, 380,219.40 and 185,000.40 is: 255,036.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,806.80 : 380,219.40 = 185,000.40 : x
  2. Step 2: Convert to fraction form
    275,806.80/380,219.40 = 185,000.40/x
  3. Step 3: Cross multiply
    275,806.80x = 380,219.40 × 185,000.40
  4. Step 4: Simplify right side
    275,806.80x = 70,340,741,087.76
  5. Step 5: Solve for x
    x = 70,340,741,087.76/275,806.80
  6. Step 6: Final answer
    x = 255,036.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.