Finding the Fourth Proportional to 1,319,971.75, 1,979,991.81 and 421,412.74
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Solution
The fourth proportional to 1,319,971.75, 1,979,991.81 and 421,412.74 is: 632,130.02
Step by Step Solution
- Step 1: Write the proportion equation
1,319,971.75 : 1,979,991.81 = 421,412.74 : x - Step 2: Convert to fraction form
1,319,971.75/1,979,991.81 = 421,412.74/x - Step 3: Cross multiply
1,319,971.75x = 1,979,991.81 × 421,412.74 - Step 4: Simplify right side
1,319,971.75x = 834,393,773,829.66 - Step 5: Solve for x
x = 834,393,773,829.66/1,319,971.75 - Step 6: Final answer
x = 632,130.02
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.