Finding the Fourth Proportional to 1,117,985.08, 1,543,778.49 and 1,081,832.55
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Solution
The fourth proportional to 1,117,985.08, 1,543,778.49 and 1,081,832.55 is: 1,493,856.99
Step by Step Solution
- Step 1: Write the proportion equation
1,117,985.08 : 1,543,778.49 = 1,081,832.55 : x - Step 2: Convert to fraction form
1,117,985.08/1,543,778.49 = 1,081,832.55/x - Step 3: Cross multiply
1,117,985.08x = 1,543,778.49 × 1,081,832.55 - Step 4: Simplify right side
1,117,985.08x = 1,670,109,827,423.31 - Step 5: Solve for x
x = 1,670,109,827,423.31/1,117,985.08 - Step 6: Final answer
x = 1,493,856.99
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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.