Finding the Fourth Proportional to 219,424.36, 302,789.76 and 128,783.92
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Solution
The fourth proportional to 219,424.36, 302,789.76 and 128,783.92 is: 177,712.50
Step by Step Solution
- Step 1: Write the proportion equation
219,424.36 : 302,789.76 = 128,783.92 : x - Step 2: Convert to fraction form
219,424.36/302,789.76 = 128,783.92/x - Step 3: Cross multiply
219,424.36x = 302,789.76 × 128,783.92 - Step 4: Simplify right side
219,424.36x = 38,994,452,228.66 - Step 5: Solve for x
x = 38,994,452,228.66/219,424.36 - Step 6: Final answer
x = 177,712.50
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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.