Finding the Fourth Proportional to 691,927,323.63, 954,859,083.98 and 390,576,079.95
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Solution
The fourth proportional to 691,927,323.63, 954,859,083.98 and 390,576,079.95 is: 538,994,638.87
Step by Step Solution
- Step 1: Write the proportion equation
691,927,323.63 : 954,859,083.98 = 390,576,079.95 : x - Step 2: Convert to fraction form
691,927,323.63/954,859,083.98 = 390,576,079.95/x - Step 3: Cross multiply
691,927,323.63x = 954,859,083.98 × 390,576,079.95 - Step 4: Simplify right side
691,927,323.63x = 372,945,117,923,603,392 - Step 5: Solve for x
x = 372,945,117,923,603,392/691,927,323.63 - Step 6: Final answer
x = 538,994,638.87
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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.