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Finding the Fourth Proportional to 208,054.40, 312,081.60 and 205,980.80

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Solution

The fourth proportional to 208,054.40, 312,081.60 and 205,980.80 is: 308,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,054.40 : 312,081.60 = 205,980.80 : x
  2. Step 2: Convert to fraction form
    208,054.40/312,081.60 = 205,980.80/x
  3. Step 3: Cross multiply
    208,054.40x = 312,081.60 × 205,980.80
  4. Step 4: Simplify right side
    208,054.40x = 64,282,817,633.28
  5. Step 5: Solve for x
    x = 64,282,817,633.28/208,054.40
  6. Step 6: Final answer
    x = 308,971.20

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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.