Finding the Fourth Proportional to 391,284.21, 539,946.27 and 216,842.70
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Solution
The fourth proportional to 391,284.21, 539,946.27 and 216,842.70 is: 299,228.55
Step by Step Solution
- Step 1: Write the proportion equation
391,284.21 : 539,946.27 = 216,842.70 : x - Step 2: Convert to fraction form
391,284.21/539,946.27 = 216,842.70/x - Step 3: Cross multiply
391,284.21x = 539,946.27 × 216,842.70 - Step 4: Simplify right side
391,284.21x = 117,083,407,041.73 - Step 5: Solve for x
x = 117,083,407,041.73/391,284.21 - Step 6: Final answer
x = 299,228.55
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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.