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Finding the Fourth Proportional to 278,413.70, 384,210.89 and 151,089.29

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Solution

The fourth proportional to 278,413.70, 384,210.89 and 151,089.29 is: 208,503.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,413.70 : 384,210.89 = 151,089.29 : x
  2. Step 2: Convert to fraction form
    278,413.70/384,210.89 = 151,089.29/x
  3. Step 3: Cross multiply
    278,413.70x = 384,210.89 × 151,089.29
  4. Step 4: Simplify right side
    278,413.70x = 58,050,150,580.37
  5. Step 5: Solve for x
    x = 58,050,150,580.37/278,413.70
  6. Step 6: Final answer
    x = 208,503.21

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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.