Finding the Fourth Proportional to 287,985.21, 397,419.75 and 160,660.80
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Solution
The fourth proportional to 287,985.21, 397,419.75 and 160,660.80 is: 221,711.99
Step by Step Solution
- Step 1: Write the proportion equation
287,985.21 : 397,419.75 = 160,660.80 : x - Step 2: Convert to fraction form
287,985.21/397,419.75 = 160,660.80/x - Step 3: Cross multiply
287,985.21x = 397,419.75 × 160,660.80 - Step 4: Simplify right side
287,985.21x = 63,849,774,970.80 - Step 5: Solve for x
x = 63,849,774,970.80/287,985.21 - Step 6: Final answer
x = 221,711.99
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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.