Finding the Fourth Proportional to 811,809.81, 1,217,689.61 and 385,652.41
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Solution
The fourth proportional to 811,809.81, 1,217,689.61 and 385,652.41 is: 578,466.68
Step by Step Solution
- Step 1: Write the proportion equation
811,809.81 : 1,217,689.61 = 385,652.41 : x - Step 2: Convert to fraction form
811,809.81/1,217,689.61 = 385,652.41/x - Step 3: Cross multiply
811,809.81x = 1,217,689.61 × 385,652.41 - Step 4: Simplify right side
811,809.81x = 469,604,927,755.97 - Step 5: Solve for x
x = 469,604,927,755.97/811,809.81 - Step 6: Final answer
x = 578,466.68
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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.