Finding the Fourth Proportional to 393,416,955.75, 542,963,006.54 and 223,912,406.09
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Solution
The fourth proportional to 393,416,955.75, 542,963,006.54 and 223,912,406.09 is: 309,026,216.17
Step by Step Solution
- Step 1: Write the proportion equation
393,416,955.75 : 542,963,006.54 = 223,912,406.09 : x - Step 2: Convert to fraction form
393,416,955.75/542,963,006.54 = 223,912,406.09/x - Step 3: Cross multiply
393,416,955.75x = 542,963,006.54 × 223,912,406.09 - Step 4: Simplify right side
393,416,955.75x = 121,576,153,212,791,600 - Step 5: Solve for x
x = 121,576,153,212,791,600/393,416,955.75 - Step 6: Final answer
x = 309,026,216.17
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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.