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Finding the Fourth Proportional to 278,465.66, 384,277.79 and 151,138.52

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Solution

The fourth proportional to 278,465.66, 384,277.79 and 151,138.52 is: 208,568.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,465.66 : 384,277.79 = 151,138.52 : x
  2. Step 2: Convert to fraction form
    278,465.66/384,277.79 = 151,138.52/x
  3. Step 3: Cross multiply
    278,465.66x = 384,277.79 × 151,138.52
  4. Step 4: Simplify right side
    278,465.66x = 58,079,174,905.93
  5. Step 5: Solve for x
    x = 58,079,174,905.93/278,465.66
  6. Step 6: Final answer
    x = 208,568.54

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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.