Finding the Fourth Proportional to 715,239.99, 987,048.59 and 392,970.96
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Solution
The fourth proportional to 715,239.99, 987,048.59 and 392,970.96 is: 542,309.48
Step by Step Solution
- Step 1: Write the proportion equation
715,239.99 : 987,048.59 = 392,970.96 : x - Step 2: Convert to fraction form
715,239.99/987,048.59 = 392,970.96/x - Step 3: Cross multiply
715,239.99x = 987,048.59 × 392,970.96 - Step 4: Simplify right side
715,239.99x = 387,881,430,014.09 - Step 5: Solve for x
x = 387,881,430,014.09/715,239.99 - Step 6: Final answer
x = 542,309.48
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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.