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Finding the Fourth Proportional to 714.51, 986.19 and 481.50

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Solution

The fourth proportional to 714.51, 986.19 and 481.50 is: 664.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.51 : 986.19 = 481.50 : x
  2. Step 2: Convert to fraction form
    714.51/986.19 = 481.50/x
  3. Step 3: Cross multiply
    714.51x = 986.19 × 481.50
  4. Step 4: Simplify right side
    714.51x = 474,850.49
  5. Step 5: Solve for x
    x = 474,850.49/714.51
  6. Step 6: Final answer
    x = 664.58

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1.5x scale

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.