Finding the Fourth Proportional to 1,390,157.46, 1,917,971.19 and 778,220.10
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Solution
The fourth proportional to 1,390,157.46, 1,917,971.19 and 778,220.10 is: 1,073,694.01
Step by Step Solution
- Step 1: Write the proportion equation
1,390,157.46 : 1,917,971.19 = 778,220.10 : x - Step 2: Convert to fraction form
1,390,157.46/1,917,971.19 = 778,220.10/x - Step 3: Cross multiply
1,390,157.46x = 1,917,971.19 × 778,220.10 - Step 4: Simplify right side
1,390,157.46x = 1,492,603,731,278.92 - Step 5: Solve for x
x = 1,492,603,731,278.92/1,390,157.46 - Step 6: Final answer
x = 1,073,694.01
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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.