Finding the Fourth Proportional to 221,621.12, 305,791.80 and 130,931.63
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Solution
The fourth proportional to 221,621.12, 305,791.80 and 130,931.63 is: 180,658.86
Step by Step Solution
- Step 1: Write the proportion equation
221,621.12 : 305,791.80 = 130,931.63 : x - Step 2: Convert to fraction form
221,621.12/305,791.80 = 130,931.63/x - Step 3: Cross multiply
221,621.12x = 305,791.80 × 130,931.63 - Step 4: Simplify right side
221,621.12x = 40,037,818,814.63 - Step 5: Solve for x
x = 40,037,818,814.63/221,621.12 - Step 6: Final answer
x = 180,658.86
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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.