Finding the Fourth Proportional to 387,950,929.12, 535,364,693.40 and 211,740,187.84
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Solution
The fourth proportional to 387,950,929.12, 535,364,693.40 and 211,740,187.84 is: 292,197,317.33
Step by Step Solution
- Step 1: Write the proportion equation
387,950,929.12 : 535,364,693.40 = 211,740,187.84 : x - Step 2: Convert to fraction form
387,950,929.12/535,364,693.40 = 211,740,187.84/x - Step 3: Cross multiply
387,950,929.12x = 535,364,693.40 × 211,740,187.84 - Step 4: Simplify right side
387,950,929.12x = 113,358,220,743,420,000 - Step 5: Solve for x
x = 113,358,220,743,420,000/387,950,929.12 - Step 6: Final answer
x = 292,197,317.33
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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.