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Finding the Fourth Proportional to 278,301.80, 383,858.49 and 255,405.57

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Solution

The fourth proportional to 278,301.80, 383,858.49 and 255,405.57 is: 352,277.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,301.80 : 383,858.49 = 255,405.57 : x
  2. Step 2: Convert to fraction form
    278,301.80/383,858.49 = 255,405.57/x
  3. Step 3: Cross multiply
    278,301.80x = 383,858.49 × 255,405.57
  4. Step 4: Simplify right side
    278,301.80x = 98,039,595,956.09
  5. Step 5: Solve for x
    x = 98,039,595,956.09/278,301.80
  6. Step 6: Final answer
    x = 352,277.98

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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.