Finding the Fourth Proportional to 388,339,985.20, 582,509,977.80 and 101,125,649.20
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Solution
The fourth proportional to 388,339,985.20, 582,509,977.80 and 101,125,649.20 is: 151,688,473.80
Step by Step Solution
- Step 1: Write the proportion equation
388,339,985.20 : 582,509,977.80 = 101,125,649.20 : x - Step 2: Convert to fraction form
388,339,985.20/582,509,977.80 = 101,125,649.20/x - Step 3: Cross multiply
388,339,985.20x = 582,509,977.80 × 101,125,649.20 - Step 4: Simplify right side
388,339,985.20x = 58,906,699,670,502,584 - Step 5: Solve for x
x = 58,906,699,670,502,584/388,339,985.20 - Step 6: Final answer
x = 151,688,473.80
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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.