Finding the Fourth Proportional to 528,229.99, 728,379.68 and 392,515.71
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Solution
The fourth proportional to 528,229.99, 728,379.68 and 392,515.71 is: 541,242.39
Step by Step Solution
- Step 1: Write the proportion equation
528,229.99 : 728,379.68 = 392,515.71 : x - Step 2: Convert to fraction form
528,229.99/728,379.68 = 392,515.71/x - Step 3: Cross multiply
528,229.99x = 728,379.68 × 392,515.71 - Step 4: Simplify right side
528,229.99x = 285,900,462,550.77 - Step 5: Solve for x
x = 285,900,462,550.77/528,229.99 - Step 6: Final answer
x = 541,242.39
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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.