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Finding the Fourth Proportional to 312,608.25, 468,990.14 and 90,992.25

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Solution

The fourth proportional to 312,608.25, 468,990.14 and 90,992.25 is: 136,511.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,608.25 : 468,990.14 = 90,992.25 : x
  2. Step 2: Convert to fraction form
    312,608.25/468,990.14 = 90,992.25/x
  3. Step 3: Cross multiply
    312,608.25x = 468,990.14 × 90,992.25
  4. Step 4: Simplify right side
    312,608.25x = 42,674,467,611.45
  5. Step 5: Solve for x
    x = 42,674,467,611.45/312,608.25
  6. Step 6: Final answer
    x = 136,511.01

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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.