Finding the Fourth Proportional to 515,114.19, 711,005.85 and 311,132.70
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Solution
The fourth proportional to 515,114.19, 711,005.85 and 311,132.70 is: 429,452.68
Step by Step Solution
- Step 1: Write the proportion equation
515,114.19 : 711,005.85 = 311,132.70 : x - Step 2: Convert to fraction form
515,114.19/711,005.85 = 311,132.70/x - Step 3: Cross multiply
515,114.19x = 711,005.85 × 311,132.70 - Step 4: Simplify right side
515,114.19x = 221,217,169,826.30 - Step 5: Solve for x
x = 221,217,169,826.30/515,114.19 - Step 6: Final answer
x = 429,452.68
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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.