Finding the Fourth Proportional to 720,465,505.48, 994,243,247.58 and 390,440,644.48
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Solution
The fourth proportional to 720,465,505.48, 994,243,247.58 and 390,440,644.48 is: 538,808,550.03
Step by Step Solution
- Step 1: Write the proportion equation
720,465,505.48 : 994,243,247.58 = 390,440,644.48 : x - Step 2: Convert to fraction form
720,465,505.48/994,243,247.58 = 390,440,644.48/x - Step 3: Cross multiply
720,465,505.48x = 994,243,247.58 × 390,440,644.48 - Step 4: Simplify right side
720,465,505.48x = 388,192,974,355,023,424 - Step 5: Solve for x
x = 388,192,974,355,023,424/720,465,505.48 - Step 6: Final answer
x = 538,808,550.03
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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.