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Finding the Fourth Proportional to 383,608.70, 575,413.05 and 243,986.30

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Solution

The fourth proportional to 383,608.70, 575,413.05 and 243,986.30 is: 365,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,608.70 : 575,413.05 = 243,986.30 : x
  2. Step 2: Convert to fraction form
    383,608.70/575,413.05 = 243,986.30/x
  3. Step 3: Cross multiply
    383,608.70x = 575,413.05 × 243,986.30
  4. Step 4: Simplify right side
    383,608.70x = 140,392,901,041.22
  5. Step 5: Solve for x
    x = 140,392,901,041.22/383,608.70
  6. Step 6: Final answer
    x = 365,979.45

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Double scale
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Similar ratio
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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.