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Finding the Fourth Proportional to 278,759.95, 384,689.19 and 151,435.65

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Solution

The fourth proportional to 278,759.95, 384,689.19 and 151,435.65 is: 208,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,759.95 : 384,689.19 = 151,435.65 : x
  2. Step 2: Convert to fraction form
    278,759.95/384,689.19 = 151,435.65/x
  3. Step 3: Cross multiply
    278,759.95x = 384,689.19 × 151,435.65
  4. Step 4: Simplify right side
    278,759.95x = 58,255,657,535.62
  5. Step 5: Solve for x
    x = 58,255,657,535.62/278,759.95
  6. Step 6: Final answer
    x = 208,981.45

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