Finding the Fourth Proportional to 810,331.80, 1,215,497.70 and 390,427.80
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Solution
The fourth proportional to 810,331.80, 1,215,497.70 and 390,427.80 is: 585,641.70
Step by Step Solution
- Step 1: Write the proportion equation
810,331.80 : 1,215,497.70 = 390,427.80 : x - Step 2: Convert to fraction form
810,331.80/1,215,497.70 = 390,427.80/x - Step 3: Cross multiply
810,331.80x = 1,215,497.70 × 390,427.80 - Step 4: Simplify right side
810,331.80x = 474,564,092,916.06 - Step 5: Solve for x
x = 474,564,092,916.06/810,331.80 - Step 6: Final answer
x = 585,641.70
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1.5x scale
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.