Finding the Fourth Proportional to 769,440.74, 1,154,220.69 and 257,107.65
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Solution
The fourth proportional to 769,440.74, 1,154,220.69 and 257,107.65 is: 385,681.38
Step by Step Solution
- Step 1: Write the proportion equation
769,440.74 : 1,154,220.69 = 257,107.65 : x - Step 2: Convert to fraction form
769,440.74/1,154,220.69 = 257,107.65/x - Step 3: Cross multiply
769,440.74x = 1,154,220.69 × 257,107.65 - Step 4: Simplify right side
769,440.74x = 296,758,966,900.00 - Step 5: Solve for x
x = 296,758,966,900.00/769,440.74 - Step 6: Final answer
x = 385,681.38
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Double scale
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Similar ratio
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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.