Finding the Third Proportional to 390,372,220.13 and 520,438,218.19
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Solution
The third proportional to 390,372,220.13 and 520,438,218.19 is: 693,840,199.14
Step by Step Solution
- Step 1: Write the proportion equation
390,372,220.13 : 520,438,218.19 = 520,438,218.19 : x - Step 2: Convert to fraction form
390,372,220.13/520,438,218.19 = 520,438,218.19/x - Step 3: Cross multiply
390,372,220.13x = 520,438,218.19 × 520,438,218.19 - Step 4: Simplify right side
390,372,220.13x = 270,855,938,950,179,840 - Step 5: Solve for x
x = 270,855,938,950,179,840/390,372,220.13 - Step 6: Final answer
x = 693,840,199.14
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Why These Related Problems?
These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.