Finding the Fourth Proportional to 391,495.84, 540,246.18 and 221,731.18
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Solution
The fourth proportional to 391,495.84, 540,246.18 and 221,731.18 is: 305,978.79
Step by Step Solution
- Step 1: Write the proportion equation
391,495.84 : 540,246.18 = 221,731.18 : x - Step 2: Convert to fraction form
391,495.84/540,246.18 = 221,731.18/x - Step 3: Cross multiply
391,495.84x = 540,246.18 × 221,731.18 - Step 4: Simplify right side
391,495.84x = 119,789,422,981.89 - Step 5: Solve for x
x = 119,789,422,981.89/391,495.84 - Step 6: Final answer
x = 305,978.79
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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.