Finding the Fourth Proportional to 283,259.40, 390,909.12 and 155,946.84
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Solution
The fourth proportional to 283,259.40, 390,909.12 and 155,946.84 is: 215,212.78
Step by Step Solution
- Step 1: Write the proportion equation
283,259.40 : 390,909.12 = 155,946.84 : x - Step 2: Convert to fraction form
283,259.40/390,909.12 = 155,946.84/x - Step 3: Cross multiply
283,259.40x = 390,909.12 × 155,946.84 - Step 4: Simplify right side
283,259.40x = 60,961,041,991.18 - Step 5: Solve for x
x = 60,961,041,991.18/283,259.40 - Step 6: Final answer
x = 215,212.78
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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.