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Finding the Fourth Proportional to 982.64, 1,356.56 and 669.56

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Solution

The fourth proportional to 982.64, 1,356.56 and 669.56 is: 924.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.64 : 1,356.56 = 669.56 : x
  2. Step 2: Convert to fraction form
    982.64/1,356.56 = 669.56/x
  3. Step 3: Cross multiply
    982.64x = 1,356.56 × 669.56
  4. Step 4: Simplify right side
    982.64x = 908,298.31
  5. Step 5: Solve for x
    x = 908,298.31/982.64
  6. Step 6: Final answer
    x = 924.34

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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.