Home / 855,980.80-1,283,968.16-256,939.36

Finding the Fourth Proportional to 855,980.80, 1,283,968.16 and 256,939.36

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Solution

The fourth proportional to 855,980.80, 1,283,968.16 and 256,939.36 is: 385,408.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,980.80 : 1,283,968.16 = 256,939.36 : x
  2. Step 2: Convert to fraction form
    855,980.80/1,283,968.16 = 256,939.36/x
  3. Step 3: Cross multiply
    855,980.80x = 1,283,968.16 × 256,939.36
  4. Step 4: Simplify right side
    855,980.80x = 329,901,957,290.78
  5. Step 5: Solve for x
    x = 329,901,957,290.78/855,980.80
  6. Step 6: Final answer
    x = 385,408.13

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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.