Finding the Fourth Proportional to 640,328.40, 883,687.21 and 368,437.60
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Solution
The fourth proportional to 640,328.40, 883,687.21 and 368,437.60 is: 508,463.46
Step by Step Solution
- Step 1: Write the proportion equation
640,328.40 : 883,687.21 = 368,437.60 : x - Step 2: Convert to fraction form
640,328.40/883,687.21 = 368,437.60/x - Step 3: Cross multiply
640,328.40x = 883,687.21 × 368,437.60 - Step 4: Simplify right side
640,328.40x = 325,583,594,803.10 - Step 5: Solve for x
x = 325,583,594,803.10/640,328.40 - Step 6: Final answer
x = 508,463.46
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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.