Finding the Fourth Proportional to 438,423.80, 657,635.70 and 320,325.80
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Solution
The fourth proportional to 438,423.80, 657,635.70 and 320,325.80 is: 480,488.70
Step by Step Solution
- Step 1: Write the proportion equation
438,423.80 : 657,635.70 = 320,325.80 : x - Step 2: Convert to fraction form
438,423.80/657,635.70 = 320,325.80/x - Step 3: Cross multiply
438,423.80x = 657,635.70 × 320,325.80 - Step 4: Simplify right side
438,423.80x = 210,657,681,711.06 - Step 5: Solve for x
x = 210,657,681,711.06/438,423.80 - Step 6: Final answer
x = 480,488.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.