Finding the Fourth Proportional to 709,644.95, 979,163.84 and 407,780.63
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Solution
The fourth proportional to 709,644.95, 979,163.84 and 407,780.63 is: 562,653.26
Step by Step Solution
- Step 1: Write the proportion equation
709,644.95 : 979,163.84 = 407,780.63 : x - Step 2: Convert to fraction form
709,644.95/979,163.84 = 407,780.63/x - Step 3: Cross multiply
709,644.95x = 979,163.84 × 407,780.63 - Step 4: Simplify right side
709,644.95x = 399,284,047,548.42 - Step 5: Solve for x
x = 399,284,047,548.42/709,644.95 - Step 6: Final answer
x = 562,653.26
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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.