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Finding the Fourth Proportional to 660,680.51, 990,889.54 and 323,576.33

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Solution

The fourth proportional to 660,680.51, 990,889.54 and 323,576.33 is: 485,300.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,680.51 : 990,889.54 = 323,576.33 : x
  2. Step 2: Convert to fraction form
    660,680.51/990,889.54 = 323,576.33/x
  3. Step 3: Cross multiply
    660,680.51x = 990,889.54 × 323,576.33
  4. Step 4: Simplify right side
    660,680.51x = 320,628,395,025.20
  5. Step 5: Solve for x
    x = 320,628,395,025.20/660,680.51
  6. Step 6: Final answer
    x = 485,300.22

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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.