Finding the Fourth Proportional to 485,438.10, 728,157.15 and 326,807.70
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Solution
The fourth proportional to 485,438.10, 728,157.15 and 326,807.70 is: 490,211.55
Step by Step Solution
- Step 1: Write the proportion equation
485,438.10 : 728,157.15 = 326,807.70 : x - Step 2: Convert to fraction form
485,438.10/728,157.15 = 326,807.70/x - Step 3: Cross multiply
485,438.10x = 728,157.15 × 326,807.70 - Step 4: Simplify right side
485,438.10x = 237,967,363,430.06 - Step 5: Solve for x
x = 237,967,363,430.06/485,438.10 - Step 6: Final answer
x = 490,211.55
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1.5x scale
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.