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Finding the Fourth Proportional to 478,739.43, 718,215.72 and 208,911.12

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Solution

The fourth proportional to 478,739.43, 718,215.72 and 208,911.12 is: 313,413.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,739.43 : 718,215.72 = 208,911.12 : x
  2. Step 2: Convert to fraction form
    478,739.43/718,215.72 = 208,911.12/x
  3. Step 3: Cross multiply
    478,739.43x = 718,215.72 × 208,911.12
  4. Step 4: Simplify right side
    478,739.43x = 150,043,250,466.81
  5. Step 5: Solve for x
    x = 150,043,250,466.81/478,739.43
  6. Step 6: Final answer
    x = 313,413.19

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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.