Finding the Fourth Proportional to 489,963.20, 734,944.80 and 411,231.20
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Solution
The fourth proportional to 489,963.20, 734,944.80 and 411,231.20 is: 616,846.80
Step by Step Solution
- Step 1: Write the proportion equation
489,963.20 : 734,944.80 = 411,231.20 : x - Step 2: Convert to fraction form
489,963.20/734,944.80 = 411,231.20/x - Step 3: Cross multiply
489,963.20x = 734,944.80 × 411,231.20 - Step 4: Simplify right side
489,963.20x = 302,232,232,037.76 - Step 5: Solve for x
x = 302,232,232,037.76/489,963.20 - Step 6: Final answer
x = 616,846.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.