Finding the Fourth Proportional to 640,458.76, 883,878.84 and 353,972.68
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Solution
The fourth proportional to 640,458.76, 883,878.84 and 353,972.68 is: 488,507.58
Step by Step Solution
- Step 1: Write the proportion equation
640,458.76 : 883,878.84 = 353,972.68 : x - Step 2: Convert to fraction form
640,458.76/883,878.84 = 353,972.68/x - Step 3: Cross multiply
640,458.76x = 883,878.84 × 353,972.68 - Step 4: Simplify right side
640,458.76x = 312,868,961,790.09 - Step 5: Solve for x
x = 312,868,961,790.09/640,458.76 - Step 6: Final answer
x = 488,507.58
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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.