Finding the Fourth Proportional to 684,390.81, 944,421.62 and 378,449.49
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Solution
The fourth proportional to 684,390.81, 944,421.62 and 378,449.49 is: 522,239.45
Step by Step Solution
- Step 1: Write the proportion equation
684,390.81 : 944,421.62 = 378,449.49 : x - Step 2: Convert to fraction form
684,390.81/944,421.62 = 378,449.49/x - Step 3: Cross multiply
684,390.81x = 944,421.62 × 378,449.49 - Step 4: Simplify right side
684,390.81x = 357,415,878,541.73 - Step 5: Solve for x
x = 357,415,878,541.73/684,390.81 - Step 6: Final answer
x = 522,239.45
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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.