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Finding the Fourth Proportional to 855,239, 1,282,858.47 and 393,570.36

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Solution

The fourth proportional to 855,239, 1,282,858.47 and 393,570.36 is: 590,355.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    855,239 : 1,282,858.47 = 393,570.36 : x
  2. Step 2: Convert to fraction form
    855,239/1,282,858.47 = 393,570.36/x
  3. Step 3: Cross multiply
    855,239x = 1,282,858.47 × 393,570.36
  4. Step 4: Simplify right side
    855,239x = 504,895,069,866.95
  5. Step 5: Solve for x
    x = 504,895,069,866.95/855,239
  6. Step 6: Final answer
    x = 590,355.53

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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.