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Finding the Fourth Proportional to 278,390.35, 384,179.70 and 151,065.94

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Solution

The fourth proportional to 278,390.35, 384,179.70 and 151,065.94 is: 208,471.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,390.35 : 384,179.70 = 151,065.94 : x
  2. Step 2: Convert to fraction form
    278,390.35/384,179.70 = 151,065.94/x
  3. Step 3: Cross multiply
    278,390.35x = 384,179.70 × 151,065.94
  4. Step 4: Simplify right side
    278,390.35x = 58,036,467,509.42
  5. Step 5: Solve for x
    x = 58,036,467,509.42/278,390.35
  6. Step 6: Final answer
    x = 208,471.55

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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.