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Finding the Fourth Proportional to 982.76, 1,356.49 and 584.70

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Solution

The fourth proportional to 982.76, 1,356.49 and 584.70 is: 807.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.76 : 1,356.49 = 584.70 : x
  2. Step 2: Convert to fraction form
    982.76/1,356.49 = 584.70/x
  3. Step 3: Cross multiply
    982.76x = 1,356.49 × 584.70
  4. Step 4: Simplify right side
    982.76x = 793,139.70
  5. Step 5: Solve for x
    x = 793,139.70/982.76
  6. Step 6: Final answer
    x = 807.06

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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.