Finding the Fourth Proportional to 391,205.50, 539,876.86 and 219,130.84
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Solution
The fourth proportional to 391,205.50, 539,876.86 and 219,130.84 is: 302,407.99
Step by Step Solution
- Step 1: Write the proportion equation
391,205.50 : 539,876.86 = 219,130.84 : x - Step 2: Convert to fraction form
391,205.50/539,876.86 = 219,130.84/x - Step 3: Cross multiply
391,205.50x = 539,876.86 × 219,130.84 - Step 4: Simplify right side
391,205.50x = 118,303,669,828.36 - Step 5: Solve for x
x = 118,303,669,828.36/391,205.50 - Step 6: Final answer
x = 302,407.99
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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.