Finding the Fourth Proportional to 919,563,710.20, 1,379,345,565.30 and 819,794,519.80
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Solution
The fourth proportional to 919,563,710.20, 1,379,345,565.30 and 819,794,519.80 is: 1,229,691,779.70
Step by Step Solution
- Step 1: Write the proportion equation
919,563,710.20 : 1,379,345,565.30 = 819,794,519.80 : x - Step 2: Convert to fraction form
919,563,710.20/1,379,345,565.30 = 819,794,519.80/x - Step 3: Cross multiply
919,563,710.20x = 1,379,345,565.30 × 819,794,519.80 - Step 4: Simplify right side
919,563,710.20x = 1,130,779,935,343,372,928 - Step 5: Solve for x
x = 1,130,779,935,343,372,928/919,563,710.20 - Step 6: Final answer
x = 1,229,691,779.70
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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.