Finding the Third Proportional to 490 and 618
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Solution
The third proportional to 490 and 618 is: 779.44
Step by Step Solution
- Step 1: Write the proportion equation
490 : 618 = 618 : x - Step 2: Convert to fraction form
490/618 = 618/x - Step 3: Cross multiply
490x = 618 × 618 - Step 4: Simplify right side
490x = 381,924 - Step 5: Solve for x
x = 381,924/490 - Step 6: Final answer
x = 779.44
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These problems maintain the same ratio (1.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.