Finding the Fourth Proportional to 1,390,543.92, 1,920,066.63 and 1,117,737.54
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Solution
The fourth proportional to 1,390,543.92, 1,920,066.63 and 1,117,737.54 is: 1,543,374.88
Step by Step Solution
- Step 1: Write the proportion equation
1,390,543.92 : 1,920,066.63 = 1,117,737.54 : x - Step 2: Convert to fraction form
1,390,543.92/1,920,066.63 = 1,117,737.54/x - Step 3: Cross multiply
1,390,543.92x = 1,920,066.63 × 1,117,737.54 - Step 4: Simplify right side
1,390,543.92x = 2,146,130,551,652.29 - Step 5: Solve for x
x = 2,146,130,551,652.29/1,390,543.92 - Step 6: Final answer
x = 1,543,374.88
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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.