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Finding the Fourth Proportional to 714.72, 982.82 and 621.30

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Solution

The fourth proportional to 714.72, 982.82 and 621.30 is: 854.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.72 : 982.82 = 621.30 : x
  2. Step 2: Convert to fraction form
    714.72/982.82 = 621.30/x
  3. Step 3: Cross multiply
    714.72x = 982.82 × 621.30
  4. Step 4: Simplify right side
    714.72x = 610,626.07
  5. Step 5: Solve for x
    x = 610,626.07/714.72
  6. Step 6: Final answer
    x = 854.36

Related Problems

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Double scale
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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.