Finding the Fourth Proportional to 839,815,423.20, 1,259,723,134.80 and 379,768,600.80
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Solution
The fourth proportional to 839,815,423.20, 1,259,723,134.80 and 379,768,600.80 is: 569,652,901.20
Step by Step Solution
- Step 1: Write the proportion equation
839,815,423.20 : 1,259,723,134.80 = 379,768,600.80 : x - Step 2: Convert to fraction form
839,815,423.20/1,259,723,134.80 = 379,768,600.80/x - Step 3: Cross multiply
839,815,423.20x = 1,259,723,134.80 × 379,768,600.80 - Step 4: Simplify right side
839,815,423.20x = 478,403,292,298,385,792 - Step 5: Solve for x
x = 478,403,292,298,385,792/839,815,423.20 - Step 6: Final answer
x = 569,652,901.20
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Double scale
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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.