Finding the Fourth Proportional to 257,507.72, 355,354.50 and 142,785.80
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Solution
The fourth proportional to 257,507.72, 355,354.50 and 142,785.80 is: 197,040.99
Step by Step Solution
- Step 1: Write the proportion equation
257,507.72 : 355,354.50 = 142,785.80 : x - Step 2: Convert to fraction form
257,507.72/355,354.50 = 142,785.80/x - Step 3: Cross multiply
257,507.72x = 355,354.50 × 142,785.80 - Step 4: Simplify right side
257,507.72x = 50,739,576,566.10 - Step 5: Solve for x
x = 50,739,576,566.10/257,507.72 - Step 6: Final answer
x = 197,040.99
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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.