Finding the Fourth Proportional to 398,106.20, 549,378.33 and 216,821.31
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Solution
The fourth proportional to 398,106.20, 549,378.33 and 216,821.31 is: 299,208.93
Step by Step Solution
- Step 1: Write the proportion equation
398,106.20 : 549,378.33 = 216,821.31 : x - Step 2: Convert to fraction form
398,106.20/549,378.33 = 216,821.31/x - Step 3: Cross multiply
398,106.20x = 549,378.33 × 216,821.31 - Step 4: Simplify right side
398,106.20x = 119,116,929,196.21 - Step 5: Solve for x
x = 119,116,929,196.21/398,106.20 - Step 6: Final answer
x = 299,208.93
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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.