Finding the Fourth Proportional to 290,430,140.18, 400,781,931.57 and 158,268,319.88
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Solution
The fourth proportional to 290,430,140.18, 400,781,931.57 and 158,268,319.88 is: 218,403,926.35
Step by Step Solution
- Step 1: Write the proportion equation
290,430,140.18 : 400,781,931.57 = 158,268,319.88 : x - Step 2: Convert to fraction form
290,430,140.18/400,781,931.57 = 158,268,319.88/x - Step 3: Cross multiply
290,430,140.18x = 400,781,931.57 × 158,268,319.88 - Step 4: Simplify right side
290,430,140.18x = 63,431,082,945,841,120 - Step 5: Solve for x
x = 63,431,082,945,841,120/290,430,140.18 - Step 6: Final answer
x = 218,403,926.35
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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.