Finding the Fourth Proportional to 1,281,950,999.12, 1,769,092,378.44 and 695,240,135.12
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Solution
The fourth proportional to 1,281,950,999.12, 1,769,092,378.44 and 695,240,135.12 is: 959,431,386.28
Step by Step Solution
- Step 1: Write the proportion equation
1,281,950,999.12 : 1,769,092,378.44 = 695,240,135.12 : x - Step 2: Convert to fraction form
1,281,950,999.12/1,769,092,378.44 = 695,240,135.12/x - Step 3: Cross multiply
1,281,950,999.12x = 1,769,092,378.44 × 695,240,135.12 - Step 4: Simplify right side
1,281,950,999.12x = 1,229,944,024,226,387,712 - Step 5: Solve for x
x = 1,229,944,024,226,387,712/1,281,950,999.12 - Step 6: Final answer
x = 959,431,386.28
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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.