Finding the Fourth Proportional to 696,447.15, 961,137.09 and 390,621.63
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Solution
The fourth proportional to 696,447.15, 961,137.09 and 390,621.63 is: 539,080.30
Step by Step Solution
- Step 1: Write the proportion equation
696,447.15 : 961,137.09 = 390,621.63 : x - Step 2: Convert to fraction form
696,447.15/961,137.09 = 390,621.63/x - Step 3: Cross multiply
696,447.15x = 961,137.09 × 390,621.63 - Step 4: Simplify right side
696,447.15x = 375,440,936,749.26 - Step 5: Solve for x
x = 375,440,936,749.26/696,447.15 - Step 6: Final answer
x = 539,080.30
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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.