Finding the Fourth Proportional to 318,215.10, 439,152.62 and 197,395.31
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Solution
The fourth proportional to 318,215.10, 439,152.62 and 197,395.31 is: 272,415.32
Step by Step Solution
- Step 1: Write the proportion equation
318,215.10 : 439,152.62 = 197,395.31 : x - Step 2: Convert to fraction form
318,215.10/439,152.62 = 197,395.31/x - Step 3: Cross multiply
318,215.10x = 439,152.62 × 197,395.31 - Step 4: Simplify right side
318,215.10x = 86,686,667,562.21 - Step 5: Solve for x
x = 86,686,667,562.21/318,215.10 - Step 6: Final answer
x = 272,415.32
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1.5x scale
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.