Finding the Fourth Proportional to 389,994.99, 537,672.64 and 309,688.35
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Solution
The fourth proportional to 389,994.99, 537,672.64 and 309,688.35 is: 426,956.65
Step by Step Solution
- Step 1: Write the proportion equation
389,994.99 : 537,672.64 = 309,688.35 : x - Step 2: Convert to fraction form
389,994.99/537,672.64 = 309,688.35/x - Step 3: Cross multiply
389,994.99x = 537,672.64 × 309,688.35 - Step 4: Simplify right side
389,994.99x = 166,510,952,721.74 - Step 5: Solve for x
x = 166,510,952,721.74/389,994.99 - Step 6: Final answer
x = 426,956.65
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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.