Finding the Fourth Proportional to 678,905.80, 1,018,358.70 and 442,709.80
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Solution
The fourth proportional to 678,905.80, 1,018,358.70 and 442,709.80 is: 664,064.70
Step by Step Solution
- Step 1: Write the proportion equation
678,905.80 : 1,018,358.70 = 442,709.80 : x - Step 2: Convert to fraction form
678,905.80/1,018,358.70 = 442,709.80/x - Step 3: Cross multiply
678,905.80x = 1,018,358.70 × 442,709.80 - Step 4: Simplify right side
678,905.80x = 450,837,376,405.26 - Step 5: Solve for x
x = 450,837,376,405.26/678,905.80 - Step 6: Final answer
x = 664,064.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.