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Finding the Fourth Proportional to 982.88, 1,356.56 and 584.63

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Solution

The fourth proportional to 982.88, 1,356.56 and 584.63 is: 806.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.88 : 1,356.56 = 584.63 : x
  2. Step 2: Convert to fraction form
    982.88/1,356.56 = 584.63/x
  3. Step 3: Cross multiply
    982.88x = 1,356.56 × 584.63
  4. Step 4: Simplify right side
    982.88x = 793,075.97
  5. Step 5: Solve for x
    x = 793,075.97/982.88
  6. Step 6: Final answer
    x = 806.89

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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.