Finding the Fourth Proportional to 1,298,720.70, 1,791,074.16 and 815,330.79
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Solution
The fourth proportional to 1,298,720.70, 1,791,074.16 and 815,330.79 is: 1,124,427.99
Step by Step Solution
- Step 1: Write the proportion equation
1,298,720.70 : 1,791,074.16 = 815,330.79 : x - Step 2: Convert to fraction form
1,298,720.70/1,791,074.16 = 815,330.79/x - Step 3: Cross multiply
1,298,720.70x = 1,791,074.16 × 815,330.79 - Step 4: Simplify right side
1,298,720.70x = 1,460,317,909,821.39 - Step 5: Solve for x
x = 1,460,317,909,821.39/1,298,720.70 - Step 6: Final answer
x = 1,124,427.99
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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.