Finding the Fourth Proportional to 638,390.74, 880,985.21 and 351,921.08
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Solution
The fourth proportional to 638,390.74, 880,985.21 and 351,921.08 is: 485,654.38
Step by Step Solution
- Step 1: Write the proportion equation
638,390.74 : 880,985.21 = 351,921.08 : x - Step 2: Convert to fraction form
638,390.74/880,985.21 = 351,921.08/x - Step 3: Cross multiply
638,390.74x = 880,985.21 × 351,921.08 - Step 4: Simplify right side
638,390.74x = 310,037,260,402.70 - Step 5: Solve for x
x = 310,037,260,402.70/638,390.74 - Step 6: Final answer
x = 485,654.38
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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.