Finding the Fourth Proportional to 645,809.99, 891,341.20 and 427,633.86
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Solution
The fourth proportional to 645,809.99, 891,341.20 and 427,633.86 is: 590,216.45
Step by Step Solution
- Step 1: Write the proportion equation
645,809.99 : 891,341.20 = 427,633.86 : x - Step 2: Convert to fraction form
645,809.99/891,341.20 = 427,633.86/x - Step 3: Cross multiply
645,809.99x = 891,341.20 × 427,633.86 - Step 4: Simplify right side
645,809.99x = 381,167,677,933.03 - Step 5: Solve for x
x = 381,167,677,933.03/645,809.99 - Step 6: Final answer
x = 590,216.45
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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.