Finding the Fourth Proportional to 390,578.63, 538,972.99 and 218,466.72
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Solution
The fourth proportional to 390,578.63, 538,972.99 and 218,466.72 is: 301,469.80
Step by Step Solution
- Step 1: Write the proportion equation
390,578.63 : 538,972.99 = 218,466.72 : x - Step 2: Convert to fraction form
390,578.63/538,972.99 = 218,466.72/x - Step 3: Cross multiply
390,578.63x = 538,972.99 × 218,466.72 - Step 4: Simplify right side
390,578.63x = 117,747,660,747.73 - Step 5: Solve for x
x = 117,747,660,747.73/390,578.63 - Step 6: Final answer
x = 301,469.80
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.