Finding the Fourth Proportional to 646,645.20, 892,439.99 and 356,285.96
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Solution
The fourth proportional to 646,645.20, 892,439.99 and 356,285.96 is: 491,712.98
Step by Step Solution
- Step 1: Write the proportion equation
646,645.20 : 892,439.99 = 356,285.96 : x - Step 2: Convert to fraction form
646,645.20/892,439.99 = 356,285.96/x - Step 3: Cross multiply
646,645.20x = 892,439.99 × 356,285.96 - Step 4: Simplify right side
646,645.20x = 317,963,838,579.54 - Step 5: Solve for x
x = 317,963,838,579.54/646,645.20 - Step 6: Final answer
x = 491,712.98
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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.