Finding the Fourth Proportional to 1,042,978,855.80, 1,564,468,283.70 and 315,967,567.80
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Solution
The fourth proportional to 1,042,978,855.80, 1,564,468,283.70 and 315,967,567.80 is: 473,951,351.70
Step by Step Solution
- Step 1: Write the proportion equation
1,042,978,855.80 : 1,564,468,283.70 = 315,967,567.80 : x - Step 2: Convert to fraction form
1,042,978,855.80/1,564,468,283.70 = 315,967,567.80/x - Step 3: Cross multiply
1,042,978,855.80x = 1,564,468,283.70 × 315,967,567.80 - Step 4: Simplify right side
1,042,978,855.80x = 494,321,238,500,929,408 - Step 5: Solve for x
x = 494,321,238,500,929,408/1,042,978,855.80 - Step 6: Final answer
x = 473,951,351.70
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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.