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Finding the Fourth Proportional to 278,809.62, 384,756.66 and 151,485.72

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Solution

The fourth proportional to 278,809.62, 384,756.66 and 151,485.72 is: 209,049.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,809.62 : 384,756.66 = 151,485.72 : x
  2. Step 2: Convert to fraction form
    278,809.62/384,756.66 = 151,485.72/x
  3. Step 3: Cross multiply
    278,809.62x = 384,756.66 × 151,485.72
  4. Step 4: Simplify right side
    278,809.62x = 58,285,139,664.90
  5. Step 5: Solve for x
    x = 58,285,139,664.90/278,809.62
  6. Step 6: Final answer
    x = 209,049.96

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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.