Finding the Fourth Proportional to 499,991.21, 689,336.45 and 318,636.97
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Solution
The fourth proportional to 499,991.21, 689,336.45 and 318,636.97 is: 439,303.88
Step by Step Solution
- Step 1: Write the proportion equation
499,991.21 : 689,336.45 = 318,636.97 : x - Step 2: Convert to fraction form
499,991.21/689,336.45 = 318,636.97/x - Step 3: Cross multiply
499,991.21x = 689,336.45 × 318,636.97 - Step 4: Simplify right side
499,991.21x = 219,648,079,348.01 - Step 5: Solve for x
x = 219,648,079,348.01/499,991.21 - Step 6: Final answer
x = 439,303.88
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.