Finding the Fourth Proportional to 253,395.79, 349,671.12 and 138,651.55
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Solution
The fourth proportional to 253,395.79, 349,671.12 and 138,651.55 is: 191,330.88
Step by Step Solution
- Step 1: Write the proportion equation
253,395.79 : 349,671.12 = 138,651.55 : x - Step 2: Convert to fraction form
253,395.79/349,671.12 = 138,651.55/x - Step 3: Cross multiply
253,395.79x = 349,671.12 × 138,651.55 - Step 4: Simplify right side
253,395.79x = 48,482,441,029.88 - Step 5: Solve for x
x = 48,482,441,029.88/253,395.79 - Step 6: Final answer
x = 191,330.88
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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.