Finding the Fourth Proportional to 398,397.61, 549,769.11 and 217,108.99
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Solution
The fourth proportional to 398,397.61, 549,769.11 and 217,108.99 is: 299,599.73
Step by Step Solution
- Step 1: Write the proportion equation
398,397.61 : 549,769.11 = 217,108.99 : x - Step 2: Convert to fraction form
398,397.61/549,769.11 = 217,108.99/x - Step 3: Cross multiply
398,397.61x = 549,769.11 × 217,108.99 - Step 4: Simplify right side
398,397.61x = 119,359,813,456.45 - Step 5: Solve for x
x = 119,359,813,456.45/398,397.61 - Step 6: Final answer
x = 299,599.73
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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.