Finding the Fourth Proportional to 403,013.78, 556,158.99 and 221,721.81
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Solution
The fourth proportional to 403,013.78, 556,158.99 and 221,721.81 is: 305,976.09
Step by Step Solution
- Step 1: Write the proportion equation
403,013.78 : 556,158.99 = 221,721.81 : x - Step 2: Convert to fraction form
403,013.78/556,158.99 = 221,721.81/x - Step 3: Cross multiply
403,013.78x = 556,158.99 × 221,721.81 - Step 4: Simplify right side
403,013.78x = 123,312,579,478.25 - Step 5: Solve for x
x = 123,312,579,478.25/403,013.78 - Step 6: Final answer
x = 305,976.09
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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.