Finding the Fourth Proportional to 687,316.19, 948,463.43 and 381,388.91
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Solution
The fourth proportional to 687,316.19, 948,463.43 and 381,388.91 is: 526,298.43
Step by Step Solution
- Step 1: Write the proportion equation
687,316.19 : 948,463.43 = 381,388.91 : x - Step 2: Convert to fraction form
687,316.19/948,463.43 = 381,388.91/x - Step 3: Cross multiply
687,316.19x = 948,463.43 × 381,388.91 - Step 4: Simplify right side
687,316.19x = 361,733,427,093.30 - Step 5: Solve for x
x = 361,733,427,093.30/687,316.19 - Step 6: Final answer
x = 526,298.43
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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.