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Finding the Fourth Proportional to 982.37, 1,355.60 and 562.72

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Solution

The fourth proportional to 982.37, 1,355.60 and 562.72 is: 776.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.37 : 1,355.60 = 562.72 : x
  2. Step 2: Convert to fraction form
    982.37/1,355.60 = 562.72/x
  3. Step 3: Cross multiply
    982.37x = 1,355.60 × 562.72
  4. Step 4: Simplify right side
    982.37x = 762,823.23
  5. Step 5: Solve for x
    x = 762,823.23/982.37
  6. Step 6: Final answer
    x = 776.51

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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.