Finding the Fourth Proportional to 639,387,468.12, 882,354,351.36 and 360,931,396.44
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Solution
The fourth proportional to 639,387,468.12, 882,354,351.36 and 360,931,396.44 is: 498,085,126.89
Step by Step Solution
- Step 1: Write the proportion equation
639,387,468.12 : 882,354,351.36 = 360,931,396.44 : x - Step 2: Convert to fraction form
639,387,468.12/882,354,351.36 = 360,931,396.44/x - Step 3: Cross multiply
639,387,468.12x = 882,354,351.36 × 360,931,396.44 - Step 4: Simplify right side
639,387,468.12x = 318,469,388,191,275,200 - Step 5: Solve for x
x = 318,469,388,191,275,200/639,387,468.12 - Step 6: Final answer
x = 498,085,126.89
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.