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Finding the Fourth Proportional to 208,087.80, 312,131.70 and 190,884.60

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Solution

The fourth proportional to 208,087.80, 312,131.70 and 190,884.60 is: 286,326.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,087.80 : 312,131.70 = 190,884.60 : x
  2. Step 2: Convert to fraction form
    208,087.80/312,131.70 = 190,884.60/x
  3. Step 3: Cross multiply
    208,087.80x = 312,131.70 × 190,884.60
  4. Step 4: Simplify right side
    208,087.80x = 59,581,134,701.82
  5. Step 5: Solve for x
    x = 59,581,134,701.82/208,087.80
  6. Step 6: Final answer
    x = 286,326.90

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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.