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Finding the Fourth Proportional to 712.64, 982.75 and 476.60

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Solution

The fourth proportional to 712.64, 982.75 and 476.60 is: 657.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.64 : 982.75 = 476.60 : x
  2. Step 2: Convert to fraction form
    712.64/982.75 = 476.60/x
  3. Step 3: Cross multiply
    712.64x = 982.75 × 476.60
  4. Step 4: Simplify right side
    712.64x = 468,378.65
  5. Step 5: Solve for x
    x = 468,378.65/712.64
  6. Step 6: Final answer
    x = 657.24

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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.