Finding the Fourth Proportional to 1,287,130.80, 1,769,941.80 and 1,117,069.68
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Solution
The fourth proportional to 1,287,130.80, 1,769,941.80 and 1,117,069.68 is: 1,536,089.67
Step by Step Solution
- Step 1: Write the proportion equation
1,287,130.80 : 1,769,941.80 = 1,117,069.68 : x - Step 2: Convert to fraction form
1,287,130.80/1,769,941.80 = 1,117,069.68/x - Step 3: Cross multiply
1,287,130.80x = 1,769,941.80 × 1,117,069.68 - Step 4: Simplify right side
1,287,130.80x = 1,977,148,320,144.62 - Step 5: Solve for x
x = 1,977,148,320,144.62/1,287,130.80 - Step 6: Final answer
x = 1,536,089.67
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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.