Finding the Fourth Proportional to 309,903.80, 464,855.70 and 257,415.80
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Solution
The fourth proportional to 309,903.80, 464,855.70 and 257,415.80 is: 386,123.70
Step by Step Solution
- Step 1: Write the proportion equation
309,903.80 : 464,855.70 = 257,415.80 : x - Step 2: Convert to fraction form
309,903.80/464,855.70 = 257,415.80/x - Step 3: Cross multiply
309,903.80x = 464,855.70 × 257,415.80 - Step 4: Simplify right side
309,903.80x = 119,661,201,900.06 - Step 5: Solve for x
x = 119,661,201,900.06/309,903.80 - Step 6: Final answer
x = 386,123.70
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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.