Finding the Fourth Proportional to 717,458.05, 990,098.81 and 395,169.31
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Solution
The fourth proportional to 717,458.05, 990,098.81 and 395,169.31 is: 545,337.34
Step by Step Solution
- Step 1: Write the proportion equation
717,458.05 : 990,098.81 = 395,169.31 : x - Step 2: Convert to fraction form
717,458.05/990,098.81 = 395,169.31/x - Step 3: Cross multiply
717,458.05x = 990,098.81 × 395,169.31 - Step 4: Simplify right side
717,458.05x = 391,256,661,603.68 - Step 5: Solve for x
x = 391,256,661,603.68/717,458.05 - Step 6: Final answer
x = 545,337.34
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1.5x scale
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.