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Finding the Fourth Proportional to 208,853.60, 313,280.40 and 137,994.80

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Solution

The fourth proportional to 208,853.60, 313,280.40 and 137,994.80 is: 206,992.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,853.60 : 313,280.40 = 137,994.80 : x
  2. Step 2: Convert to fraction form
    208,853.60/313,280.40 = 137,994.80/x
  3. Step 3: Cross multiply
    208,853.60x = 313,280.40 × 137,994.80
  4. Step 4: Simplify right side
    208,853.60x = 43,231,066,141.92
  5. Step 5: Solve for x
    x = 43,231,066,141.92/208,853.60
  6. Step 6: Final answer
    x = 206,992.20

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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.