Finding the Fourth Proportional to 420,643.20, 630,964.80 and 378,652.80
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Solution
The fourth proportional to 420,643.20, 630,964.80 and 378,652.80 is: 567,979.20
Step by Step Solution
- Step 1: Write the proportion equation
420,643.20 : 630,964.80 = 378,652.80 : x - Step 2: Convert to fraction form
420,643.20/630,964.80 = 378,652.80/x - Step 3: Cross multiply
420,643.20x = 630,964.80 × 378,652.80 - Step 4: Simplify right side
420,643.20x = 238,916,588,221.44 - Step 5: Solve for x
x = 238,916,588,221.44/420,643.20 - Step 6: Final answer
x = 567,979.20
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.