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Finding the Fourth Proportional to 385,839.60, 578,413.80 and 252,783.60

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Solution

The fourth proportional to 385,839.60, 578,413.80 and 252,783.60 is: 378,948.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,839.60 : 578,413.80 = 252,783.60 : x
  2. Step 2: Convert to fraction form
    385,839.60/578,413.80 = 252,783.60/x
  3. Step 3: Cross multiply
    385,839.60x = 578,413.80 × 252,783.60
  4. Step 4: Simplify right side
    385,839.60x = 146,213,522,653.68
  5. Step 5: Solve for x
    x = 146,213,522,653.68/385,839.60
  6. Step 6: Final answer
    x = 378,948.98

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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.