Finding the Fourth Proportional to 285,428.90, 393,874.99 and 156,341.63
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Solution
The fourth proportional to 285,428.90, 393,874.99 and 156,341.63 is: 215,742.20
Step by Step Solution
- Step 1: Write the proportion equation
285,428.90 : 393,874.99 = 156,341.63 : x - Step 2: Convert to fraction form
285,428.90/393,874.99 = 156,341.63/x - Step 3: Cross multiply
285,428.90x = 393,874.99 × 156,341.63 - Step 4: Simplify right side
285,428.90x = 61,579,058,546.67 - Step 5: Solve for x
x = 61,579,058,546.67/285,428.90 - Step 6: Final answer
x = 215,742.20
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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.