Home / 812,021.09-1,118,021.54-715,156.43

Finding the Fourth Proportional to 812,021.09, 1,118,021.54 and 715,156.43

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Solution

The fourth proportional to 812,021.09, 1,118,021.54 and 715,156.43 is: 984,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,021.09 : 1,118,021.54 = 715,156.43 : x
  2. Step 2: Convert to fraction form
    812,021.09/1,118,021.54 = 715,156.43/x
  3. Step 3: Cross multiply
    812,021.09x = 1,118,021.54 × 715,156.43
  4. Step 4: Simplify right side
    812,021.09x = 799,560,284,043.61
  5. Step 5: Solve for x
    x = 799,560,284,043.61/812,021.09
  6. Step 6: Final answer
    x = 984,654.58

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1.5x scale

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.