Finding the Fourth Proportional to 831,729.40, 1,247,594.10 and 515,159.80
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Solution
The fourth proportional to 831,729.40, 1,247,594.10 and 515,159.80 is: 772,739.70
Step by Step Solution
- Step 1: Write the proportion equation
831,729.40 : 1,247,594.10 = 515,159.80 : x - Step 2: Convert to fraction form
831,729.40/1,247,594.10 = 515,159.80/x - Step 3: Cross multiply
831,729.40x = 1,247,594.10 × 515,159.80 - Step 4: Simplify right side
831,729.40x = 642,710,327,037.18 - Step 5: Solve for x
x = 642,710,327,037.18/831,729.40 - Step 6: Final answer
x = 772,739.70
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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.