Finding the Fourth Proportional to 499,921.29, 689,874.23 and 285,130.55
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Solution
The fourth proportional to 499,921.29, 689,874.23 and 285,130.55 is: 393,470.38
Step by Step Solution
- Step 1: Write the proportion equation
499,921.29 : 689,874.23 = 285,130.55 : x - Step 2: Convert to fraction form
499,921.29/689,874.23 = 285,130.55/x - Step 3: Cross multiply
499,921.29x = 689,874.23 × 285,130.55 - Step 4: Simplify right side
499,921.29x = 196,704,221,068.24 - Step 5: Solve for x
x = 196,704,221,068.24/499,921.29 - Step 6: Final answer
x = 393,470.38
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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.