Finding the Fourth Proportional to 409,722.21, 614,646.63 and 139,787.15
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Solution
The fourth proportional to 409,722.21, 614,646.63 and 139,787.15 is: 209,702.32
Step by Step Solution
- Step 1: Write the proportion equation
409,722.21 : 614,646.63 = 139,787.15 : x - Step 2: Convert to fraction form
409,722.21/614,646.63 = 139,787.15/x - Step 3: Cross multiply
409,722.21x = 614,646.63 × 139,787.15 - Step 4: Simplify right side
409,722.21x = 85,919,697,591.57 - Step 5: Solve for x
x = 85,919,697,591.57/409,722.21 - Step 6: Final answer
x = 209,702.32
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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.