Finding the Fourth Proportional to 717,488.11, 990,133.48 and 395,198.19
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Solution
The fourth proportional to 717,488.11, 990,133.48 and 395,198.19 is: 545,373.44
Step by Step Solution
- Step 1: Write the proportion equation
717,488.11 : 990,133.48 = 395,198.19 : x - Step 2: Convert to fraction form
717,488.11/990,133.48 = 395,198.19/x - Step 3: Cross multiply
717,488.11x = 990,133.48 × 395,198.19 - Step 4: Simplify right side
717,488.11x = 391,298,959,154.40 - Step 5: Solve for x
x = 391,298,959,154.40/717,488.11 - Step 6: Final answer
x = 545,373.44
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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.