Finding the Fourth Proportional to 1,209,253,413.79, 1,814,167,973.76 and 391,365,714.79
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Solution
The fourth proportional to 1,209,253,413.79, 1,814,167,973.76 and 391,365,714.79 is: 587,141,733.65
Step by Step Solution
- Step 1: Write the proportion equation
1,209,253,413.79 : 1,814,167,973.76 = 391,365,714.79 : x - Step 2: Convert to fraction form
1,209,253,413.79/1,814,167,973.76 = 391,365,714.79/x - Step 3: Cross multiply
1,209,253,413.79x = 1,814,167,973.76 × 391,365,714.79 - Step 4: Simplify right side
1,209,253,413.79x = 710,003,145,799,708,416 - Step 5: Solve for x
x = 710,003,145,799,708,416/1,209,253,413.79 - Step 6: Final answer
x = 587,141,733.65
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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.