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Finding the Fourth Proportional to 660,087.60, 990,034.20 and 186,820.80

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Solution

The fourth proportional to 660,087.60, 990,034.20 and 186,820.80 is: 280,203.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,087.60 : 990,034.20 = 186,820.80 : x
  2. Step 2: Convert to fraction form
    660,087.60/990,034.20 = 186,820.80/x
  3. Step 3: Cross multiply
    660,087.60x = 990,034.20 × 186,820.80
  4. Step 4: Simplify right side
    660,087.60x = 184,958,981,271.36
  5. Step 5: Solve for x
    x = 184,958,981,271.36/660,087.60
  6. Step 6: Final answer
    x = 280,203.69

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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.