Finding the Fourth Proportional to 665,538.24, 918,631.17 and 393,700.64
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Solution
The fourth proportional to 665,538.24, 918,631.17 and 393,700.64 is: 543,418.32
Step by Step Solution
- Step 1: Write the proportion equation
665,538.24 : 918,631.17 = 393,700.64 : x - Step 2: Convert to fraction form
665,538.24/918,631.17 = 393,700.64/x - Step 3: Cross multiply
665,538.24x = 918,631.17 × 393,700.64 - Step 4: Simplify right side
665,538.24x = 361,665,674,959.79 - Step 5: Solve for x
x = 361,665,674,959.79/665,538.24 - Step 6: Final answer
x = 543,418.32
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1.5x scale
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.