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Finding the Fourth Proportional to 715.02, 986.75 and 449.54

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Solution

The fourth proportional to 715.02, 986.75 and 449.54 is: 620.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.02 : 986.75 = 449.54 : x
  2. Step 2: Convert to fraction form
    715.02/986.75 = 449.54/x
  3. Step 3: Cross multiply
    715.02x = 986.75 × 449.54
  4. Step 4: Simplify right side
    715.02x = 443,583.60
  5. Step 5: Solve for x
    x = 443,583.60/715.02
  6. Step 6: Final answer
    x = 620.38

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Half scale
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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.