Finding the Fourth Proportional to 869,822,636.99, 1,200,355,434.83 and 478,682,060.99
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Solution
The fourth proportional to 869,822,636.99, 1,200,355,434.83 and 478,682,060.99 is: 660,581,351.91
Step by Step Solution
- Step 1: Write the proportion equation
869,822,636.99 : 1,200,355,434.83 = 478,682,060.99 : x - Step 2: Convert to fraction form
869,822,636.99/1,200,355,434.83 = 478,682,060.99/x - Step 3: Cross multiply
869,822,636.99x = 1,200,355,434.83 × 478,682,060.99 - Step 4: Simplify right side
869,822,636.99x = 574,588,613,460,166,976 - Step 5: Solve for x
x = 574,588,613,460,166,976/869,822,636.99 - Step 6: Final answer
x = 660,581,351.91
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Double scale
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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.