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Finding the Fourth Proportional to 855,203.72, 1,283,012.94 and 256,163.72

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Solution

The fourth proportional to 855,203.72, 1,283,012.94 and 256,163.72 is: 384,307.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,203.72 : 1,283,012.94 = 256,163.72 : x
  2. Step 2: Convert to fraction form
    855,203.72/1,283,012.94 = 256,163.72/x
  3. Step 3: Cross multiply
    855,203.72x = 1,283,012.94 × 256,163.72
  4. Step 4: Simplify right side
    855,203.72x = 328,661,367,518.54
  5. Step 5: Solve for x
    x = 328,661,367,518.54/855,203.72
  6. Step 6: Final answer
    x = 384,307.69

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1.5x scale

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.