Finding the Fourth Proportional to 420,723,690.70, 631,153,349.46 and 129,590,678.08
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Solution
The fourth proportional to 420,723,690.70, 631,153,349.46 and 129,590,678.08 is: 194,406,904.90
Step by Step Solution
- Step 1: Write the proportion equation
420,723,690.70 : 631,153,349.46 = 129,590,678.08 : x - Step 2: Convert to fraction form
420,723,690.70/631,153,349.46 = 129,590,678.08/x - Step 3: Cross multiply
420,723,690.70x = 631,153,349.46 × 129,590,678.08 - Step 4: Simplify right side
420,723,690.70x = 81,791,590,528,984,608 - Step 5: Solve for x
x = 81,791,590,528,984,608/420,723,690.70 - Step 6: Final answer
x = 194,406,904.90
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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.