Home / 811,857.07-1,120,335.15-449,296.21

Finding the Fourth Proportional to 811,857.07, 1,120,335.15 and 449,296.21

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Solution

The fourth proportional to 811,857.07, 1,120,335.15 and 449,296.21 is: 620,013.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,857.07 : 1,120,335.15 = 449,296.21 : x
  2. Step 2: Convert to fraction form
    811,857.07/1,120,335.15 = 449,296.21/x
  3. Step 3: Cross multiply
    811,857.07x = 1,120,335.15 × 449,296.21
  4. Step 4: Simplify right side
    811,857.07x = 503,362,336,824.78
  5. Step 5: Solve for x
    x = 503,362,336,824.78/811,857.07
  6. Step 6: Final answer
    x = 620,013.49

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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.