Finding the Fourth Proportional to 390,763.77, 539,282.97 and 218,698.98
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Solution
The fourth proportional to 390,763.77, 539,282.97 and 218,698.98 is: 301,820.80
Step by Step Solution
- Step 1: Write the proportion equation
390,763.77 : 539,282.97 = 218,698.98 : x - Step 2: Convert to fraction form
390,763.77/539,282.97 = 218,698.98/x - Step 3: Cross multiply
390,763.77x = 539,282.97 × 218,698.98 - Step 4: Simplify right side
390,763.77x = 117,940,635,470.37 - Step 5: Solve for x
x = 117,940,635,470.37/390,763.77 - Step 6: Final answer
x = 301,820.80
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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.