Finding the Fourth Proportional to 390,877.40, 539,419.94 and 218,791.08
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Solution
The fourth proportional to 390,877.40, 539,419.94 and 218,791.08 is: 301,936.80
Step by Step Solution
- Step 1: Write the proportion equation
390,877.40 : 539,419.94 = 218,791.08 : x - Step 2: Convert to fraction form
390,877.40/539,419.94 = 218,791.08/x - Step 3: Cross multiply
390,877.40x = 539,419.94 × 218,791.08 - Step 4: Simplify right side
390,877.40x = 118,020,270,152.18 - Step 5: Solve for x
x = 118,020,270,152.18/390,877.40 - Step 6: Final answer
x = 301,936.80
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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.