Finding the Fourth Proportional to 402,720.14, 555,739.56 and 221,430.80
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Solution
The fourth proportional to 402,720.14, 555,739.56 and 221,430.80 is: 305,566.68
Step by Step Solution
- Step 1: Write the proportion equation
402,720.14 : 555,739.56 = 221,430.80 : x - Step 2: Convert to fraction form
402,720.14/555,739.56 = 221,430.80/x - Step 3: Cross multiply
402,720.14x = 555,739.56 × 221,430.80 - Step 4: Simplify right side
402,720.14x = 123,057,855,362.45 - Step 5: Solve for x
x = 123,057,855,362.45/402,720.14 - Step 6: Final answer
x = 305,566.68
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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.