Finding the Fourth Proportional to 320,642.41, 480,963.15 and 128,603.47
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Solution
The fourth proportional to 320,642.41, 480,963.15 and 128,603.47 is: 192,905.02
Step by Step Solution
- Step 1: Write the proportion equation
320,642.41 : 480,963.15 = 128,603.47 : x - Step 2: Convert to fraction form
320,642.41/480,963.15 = 128,603.47/x - Step 3: Cross multiply
320,642.41x = 480,963.15 × 128,603.47 - Step 4: Simplify right side
320,642.41x = 61,853,530,032.13 - Step 5: Solve for x
x = 61,853,530,032.13/320,642.41 - Step 6: Final answer
x = 192,905.02
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.