Finding the Fourth Proportional to 280,164,261.47, 386,622,644.99 and 154,721,765.21
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Solution
The fourth proportional to 280,164,261.47, 386,622,644.99 and 154,721,765.21 is: 213,513,807.18
Step by Step Solution
- Step 1: Write the proportion equation
280,164,261.47 : 386,622,644.99 = 154,721,765.21 : x - Step 2: Convert to fraction form
280,164,261.47/386,622,644.99 = 154,721,765.21/x - Step 3: Cross multiply
280,164,261.47x = 386,622,644.99 × 154,721,765.21 - Step 4: Simplify right side
280,164,261.47x = 59,818,938,100,305,248 - Step 5: Solve for x
x = 59,818,938,100,305,248/280,164,261.47 - Step 6: Final answer
x = 213,513,807.18
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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.