Finding the Fourth Proportional to 455,339.70, 638,408.70 and 455,339.70
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Solution
The fourth proportional to 455,339.70, 638,408.70 and 455,339.70 is: 638,408.70
Step by Step Solution
- Step 1: Write the proportion equation
455,339.70 : 638,408.70 = 455,339.70 : x - Step 2: Convert to fraction form
455,339.70/638,408.70 = 455,339.70/x - Step 3: Cross multiply
455,339.70x = 638,408.70 × 455,339.70 - Step 4: Simplify right side
455,339.70x = 290,692,825,935.39 - Step 5: Solve for x
x = 290,692,825,935.39/455,339.70 - Step 6: Final answer
x = 638,408.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.