Finding the Fourth Proportional to 391,454.81, 540,174.66 and 217,029.68
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Solution
The fourth proportional to 391,454.81, 540,174.66 and 217,029.68 is: 299,482.67
Step by Step Solution
- Step 1: Write the proportion equation
391,454.81 : 540,174.66 = 217,029.68 : x - Step 2: Convert to fraction form
391,454.81/540,174.66 = 217,029.68/x - Step 3: Cross multiply
391,454.81x = 540,174.66 × 217,029.68 - Step 4: Simplify right side
391,454.81x = 117,233,933,603.91 - Step 5: Solve for x
x = 117,233,933,603.91/391,454.81 - Step 6: Final answer
x = 299,482.67
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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.