Finding the Fourth Proportional to 397,905.85, 549,117.09 and 216,622.99
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Solution
The fourth proportional to 397,905.85, 549,117.09 and 216,622.99 is: 298,943.55
Step by Step Solution
- Step 1: Write the proportion equation
397,905.85 : 549,117.09 = 216,622.99 : x - Step 2: Convert to fraction form
397,905.85/549,117.09 = 216,622.99/x - Step 3: Cross multiply
397,905.85x = 549,117.09 × 216,622.99 - Step 4: Simplify right side
397,905.85x = 118,951,386,582.30 - Step 5: Solve for x
x = 118,951,386,582.30/397,905.85 - Step 6: Final answer
x = 298,943.55
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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.