Finding the Fourth Proportional to 287,886.97, 431,881.49 and 138,398.23
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Solution
The fourth proportional to 287,886.97, 431,881.49 and 138,398.23 is: 207,621.88
Step by Step Solution
- Step 1: Write the proportion equation
287,886.97 : 431,881.49 = 138,398.23 : x - Step 2: Convert to fraction form
287,886.97/431,881.49 = 138,398.23/x - Step 3: Cross multiply
287,886.97x = 431,881.49 × 138,398.23 - Step 4: Simplify right side
287,886.97x = 59,771,633,785.76 - Step 5: Solve for x
x = 59,771,633,785.76/287,886.97 - Step 6: Final answer
x = 207,621.88
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.