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Finding the Fourth Proportional to 660,447.51, 990,812.40 and 205,028.69

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Solution

The fourth proportional to 660,447.51, 990,812.40 and 205,028.69 is: 307,586.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,447.51 : 990,812.40 = 205,028.69 : x
  2. Step 2: Convert to fraction form
    660,447.51/990,812.40 = 205,028.69/x
  3. Step 3: Cross multiply
    660,447.51x = 990,812.40 × 205,028.69
  4. Step 4: Simplify right side
    660,447.51x = 203,144,963,453.69
  5. Step 5: Solve for x
    x = 203,144,963,453.69/660,447.51
  6. Step 6: Final answer
    x = 307,586.84

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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.