Finding the Fourth Proportional to 398,108.20, 549,381.09 and 216,823.31
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Solution
The fourth proportional to 398,108.20, 549,381.09 and 216,823.31 is: 299,211.69
Step by Step Solution
- Step 1: Write the proportion equation
398,108.20 : 549,381.09 = 216,823.31 : x - Step 2: Convert to fraction form
398,108.20/549,381.09 = 216,823.31/x - Step 3: Cross multiply
398,108.20x = 549,381.09 × 216,823.31 - Step 4: Simplify right side
398,108.20x = 119,118,626,385.21 - Step 5: Solve for x
x = 119,118,626,385.21/398,108.20 - Step 6: Final answer
x = 299,211.69
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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.