Finding the Fourth Proportional to 717,749.29, 990,489.14 and 395,451.91
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Solution
The fourth proportional to 717,749.29, 990,489.14 and 395,451.91 is: 545,720.95
Step by Step Solution
- Step 1: Write the proportion equation
717,749.29 : 990,489.14 = 395,451.91 : x - Step 2: Convert to fraction form
717,749.29/990,489.14 = 395,451.91/x - Step 3: Cross multiply
717,749.29x = 990,489.14 × 395,451.91 - Step 4: Simplify right side
717,749.29x = 391,690,818,283.44 - Step 5: Solve for x
x = 391,690,818,283.44/717,749.29 - Step 6: Final answer
x = 545,720.95
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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.