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Finding the Fourth Proportional to 1,283,890.82, 1,771,747.64 and 710,918.69

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Solution

The fourth proportional to 1,283,890.82, 1,771,747.64 and 710,918.69 is: 981,055.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283,890.82 : 1,771,747.64 = 710,918.69 : x
  2. Step 2: Convert to fraction form
    1,283,890.82/1,771,747.64 = 710,918.69/x
  3. Step 3: Cross multiply
    1,283,890.82x = 1,771,747.64 × 710,918.69
  4. Step 4: Simplify right side
    1,283,890.82x = 1,259,568,512,114.17
  5. Step 5: Solve for x
    x = 1,259,568,512,114.17/1,283,890.82
  6. Step 6: Final answer
    x = 981,055.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.