Finding the Fourth Proportional to 915,603.21, 1,263,274.72 and 721,408.88
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Solution
The fourth proportional to 915,603.21, 1,263,274.72 and 721,408.88 is: 995,341.20
Step by Step Solution
- Step 1: Write the proportion equation
915,603.21 : 1,263,274.72 = 721,408.88 : x - Step 2: Convert to fraction form
915,603.21/1,263,274.72 = 721,408.88/x - Step 3: Cross multiply
915,603.21x = 1,263,274.72 × 721,408.88 - Step 4: Simplify right side
915,603.21x = 911,337,602,242.18 - Step 5: Solve for x
x = 911,337,602,242.18/915,603.21 - Step 6: Final answer
x = 995,341.20
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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.