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Finding the Fourth Proportional to 1,296,665.03, 1,945,682.81 and 920,019.89

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Solution

The fourth proportional to 1,296,665.03, 1,945,682.81 and 920,019.89 is: 1,380,516.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,296,665.03 : 1,945,682.81 = 920,019.89 : x
  2. Step 2: Convert to fraction form
    1,296,665.03/1,945,682.81 = 920,019.89/x
  3. Step 3: Cross multiply
    1,296,665.03x = 1,945,682.81 × 920,019.89
  4. Step 4: Simplify right side
    1,296,665.03x = 1,790,066,884,831.09
  5. Step 5: Solve for x
    x = 1,790,066,884,831.09/1,296,665.03
  6. Step 6: Final answer
    x = 1,380,516.05

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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.