Finding the Fourth Proportional to 665,391.60, 918,239.40 and 378,911.79
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Solution
The fourth proportional to 665,391.60, 918,239.40 and 378,911.79 is: 522,897.70
Step by Step Solution
- Step 1: Write the proportion equation
665,391.60 : 918,239.40 = 378,911.79 : x - Step 2: Convert to fraction form
665,391.60/918,239.40 = 378,911.79/x - Step 3: Cross multiply
665,391.60x = 918,239.40 × 378,911.79 - Step 4: Simplify right side
665,391.60x = 347,931,734,702.53 - Step 5: Solve for x
x = 347,931,734,702.53/665,391.60 - Step 6: Final answer
x = 522,897.70
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1.5x scale
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.