Finding the Fourth Proportional to 280,422,749.86, 386,963,129.32 and 154,973,444.60
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Solution
The fourth proportional to 280,422,749.86, 386,963,129.32 and 154,973,444.60 is: 213,852,153.99
Step by Step Solution
- Step 1: Write the proportion equation
280,422,749.86 : 386,963,129.32 = 154,973,444.60 : x - Step 2: Convert to fraction form
280,422,749.86/386,963,129.32 = 154,973,444.60/x - Step 3: Cross multiply
280,422,749.86x = 386,963,129.32 × 154,973,444.60 - Step 4: Simplify right side
280,422,749.86x = 59,969,009,084,495,624 - Step 5: Solve for x
x = 59,969,009,084,495,624/280,422,749.86 - Step 6: Final answer
x = 213,852,153.99
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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.