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Finding the Fourth Proportional to 701,211.20, 1,051,039.20 and 385,894.40

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Solution

The fourth proportional to 701,211.20, 1,051,039.20 and 385,894.40 is: 578,413.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    701,211.20 : 1,051,039.20 = 385,894.40 : x
  2. Step 2: Convert to fraction form
    701,211.20/1,051,039.20 = 385,894.40/x
  3. Step 3: Cross multiply
    701,211.20x = 1,051,039.20 × 385,894.40
  4. Step 4: Simplify right side
    701,211.20x = 405,590,141,460.48
  5. Step 5: Solve for x
    x = 405,590,141,460.48/701,211.20
  6. Step 6: Final answer
    x = 578,413.67

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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.