Finding the Fourth Proportional to 664,411,416.20, 996,617,124.30 and 509,443,220.60
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Solution
The fourth proportional to 664,411,416.20, 996,617,124.30 and 509,443,220.60 is: 764,164,830.90
Step by Step Solution
- Step 1: Write the proportion equation
664,411,416.20 : 996,617,124.30 = 509,443,220.60 : x - Step 2: Convert to fraction form
664,411,416.20/996,617,124.30 = 509,443,220.60/x - Step 3: Cross multiply
664,411,416.20x = 996,617,124.30 × 509,443,220.60 - Step 4: Simplify right side
664,411,416.20x = 507,719,837,508,502,528 - Step 5: Solve for x
x = 507,719,837,508,502,528/664,411,416.20 - Step 6: Final answer
x = 764,164,830.90
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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.