Finding the Fourth Proportional to 718,053.63, 990,920.06 and 395,764.53
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Solution
The fourth proportional to 718,053.63, 990,920.06 and 395,764.53 is: 546,158.38
Step by Step Solution
- Step 1: Write the proportion equation
718,053.63 : 990,920.06 = 395,764.53 : x - Step 2: Convert to fraction form
718,053.63/990,920.06 = 395,764.53/x - Step 3: Cross multiply
718,053.63x = 990,920.06 × 395,764.53 - Step 4: Simplify right side
718,053.63x = 392,171,009,834.65 - Step 5: Solve for x
x = 392,171,009,834.65/718,053.63 - Step 6: Final answer
x = 546,158.38
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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.