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Finding the Fourth Proportional to 278,413.60, 417,620.40 and 100,926.40

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Solution

The fourth proportional to 278,413.60, 417,620.40 and 100,926.40 is: 151,389.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,413.60 : 417,620.40 = 100,926.40 : x
  2. Step 2: Convert to fraction form
    278,413.60/417,620.40 = 100,926.40/x
  3. Step 3: Cross multiply
    278,413.60x = 417,620.40 × 100,926.40
  4. Step 4: Simplify right side
    278,413.60x = 42,148,923,538.56
  5. Step 5: Solve for x
    x = 42,148,923,538.56/278,413.60
  6. Step 6: Final answer
    x = 151,389.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.