Finding the Fourth Proportional to 489,138.10, 686,037.50 and 489,138.10
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Solution
The fourth proportional to 489,138.10, 686,037.50 and 489,138.10 is: 686,037.50
Step by Step Solution
- Step 1: Write the proportion equation
489,138.10 : 686,037.50 = 489,138.10 : x - Step 2: Convert to fraction form
489,138.10/686,037.50 = 489,138.10/x - Step 3: Cross multiply
489,138.10x = 686,037.50 × 489,138.10 - Step 4: Simplify right side
489,138.10x = 335,567,079,278.75 - Step 5: Solve for x
x = 335,567,079,278.75/489,138.10 - Step 6: Final answer
x = 686,037.50
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These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.