Finding the Fourth Proportional to 230,378.79, 317,909.47 and 128,400.87
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Solution
The fourth proportional to 230,378.79, 317,909.47 and 128,400.87 is: 177,185.81
Step by Step Solution
- Step 1: Write the proportion equation
230,378.79 : 317,909.47 = 128,400.87 : x - Step 2: Convert to fraction form
230,378.79/317,909.47 = 128,400.87/x - Step 3: Cross multiply
230,378.79x = 317,909.47 × 128,400.87 - Step 4: Simplify right side
230,378.79x = 40,819,852,529.24 - Step 5: Solve for x
x = 40,819,852,529.24/230,378.79 - Step 6: Final answer
x = 177,185.81
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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.