Finding the Fourth Proportional to 665,648.06, 918,658.62 and 393,803.36
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Solution
The fourth proportional to 665,648.06, 918,658.62 and 393,803.36 is: 543,486.68
Step by Step Solution
- Step 1: Write the proportion equation
665,648.06 : 918,658.62 = 393,803.36 : x - Step 2: Convert to fraction form
665,648.06/918,658.62 = 393,803.36/x - Step 3: Cross multiply
665,648.06x = 918,658.62 × 393,803.36 - Step 4: Simplify right side
665,648.06x = 361,770,851,248.96 - Step 5: Solve for x
x = 361,770,851,248.96/665,648.06 - Step 6: Final answer
x = 543,486.68
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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.