Finding the Fourth Proportional to 390,451.99, 585,698.51 and 109,991.11
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Solution
The fourth proportional to 390,451.99, 585,698.51 and 109,991.11 is: 164,992.45
Step by Step Solution
- Step 1: Write the proportion equation
390,451.99 : 585,698.51 = 109,991.11 : x - Step 2: Convert to fraction form
390,451.99/585,698.51 = 109,991.11/x - Step 3: Cross multiply
390,451.99x = 585,698.51 × 109,991.11 - Step 4: Simplify right side
390,451.99x = 64,421,629,240.25 - Step 5: Solve for x
x = 64,421,629,240.25/390,451.99 - Step 6: Final answer
x = 164,992.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.