Finding the Fourth Proportional to 1,178,743.80, 1,768,115.70 and 390,775.80
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Solution
The fourth proportional to 1,178,743.80, 1,768,115.70 and 390,775.80 is: 586,163.70
Step by Step Solution
- Step 1: Write the proportion equation
1,178,743.80 : 1,768,115.70 = 390,775.80 : x - Step 2: Convert to fraction form
1,178,743.80/1,768,115.70 = 390,775.80/x - Step 3: Cross multiply
1,178,743.80x = 1,768,115.70 × 390,775.80 - Step 4: Simplify right side
1,178,743.80x = 690,936,827,160.06 - Step 5: Solve for x
x = 690,936,827,160.06/1,178,743.80 - Step 6: Final answer
x = 586,163.70
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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.