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Finding the Fourth Proportional to 660,796.07, 990,709.29 and 211,258.22

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Solution

The fourth proportional to 660,796.07, 990,709.29 and 211,258.22 is: 316,732.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,796.07 : 990,709.29 = 211,258.22 : x
  2. Step 2: Convert to fraction form
    660,796.07/990,709.29 = 211,258.22/x
  3. Step 3: Cross multiply
    660,796.07x = 990,709.29 × 211,258.22
  4. Step 4: Simplify right side
    660,796.07x = 209,295,483,619.64
  5. Step 5: Solve for x
    x = 209,295,483,619.64/660,796.07
  6. Step 6: Final answer
    x = 316,732.34

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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.