Finding the Fourth Proportional to 1,188,866,379.44, 1,640,590,656.68 and 660,264,416.12
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Solution
The fourth proportional to 1,188,866,379.44, 1,640,590,656.68 and 660,264,416.12 is: 911,139,931.92
Step by Step Solution
- Step 1: Write the proportion equation
1,188,866,379.44 : 1,640,590,656.68 = 660,264,416.12 : x - Step 2: Convert to fraction form
1,188,866,379.44/1,640,590,656.68 = 660,264,416.12/x - Step 3: Cross multiply
1,188,866,379.44x = 1,640,590,656.68 × 660,264,416.12 - Step 4: Simplify right side
1,188,866,379.44x = 1,083,223,632,024,747,648 - Step 5: Solve for x
x = 1,083,223,632,024,747,648/1,188,866,379.44 - Step 6: Final answer
x = 911,139,931.92
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1.5x scale
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.