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Finding the Fourth Proportional to 1,398,524.02, 1,929,416.49 and 786,536.38

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Solution

The fourth proportional to 1,398,524.02, 1,929,416.49 and 786,536.38 is: 1,085,112.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,524.02 : 1,929,416.49 = 786,536.38 : x
  2. Step 2: Convert to fraction form
    1,398,524.02/1,929,416.49 = 786,536.38/x
  3. Step 3: Cross multiply
    1,398,524.02x = 1,929,416.49 × 786,536.38
  4. Step 4: Simplify right side
    1,398,524.02x = 1,517,556,261,556.91
  5. Step 5: Solve for x
    x = 1,517,556,261,556.91/1,398,524.02
  6. Step 6: Final answer
    x = 1,085,112.76

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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.