Finding the Fourth Proportional to 420,202.44, 630,309.12 and 139,719.68
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Solution
The fourth proportional to 420,202.44, 630,309.12 and 139,719.68 is: 209,581.34
Step by Step Solution
- Step 1: Write the proportion equation
420,202.44 : 630,309.12 = 139,719.68 : x - Step 2: Convert to fraction form
420,202.44/630,309.12 = 139,719.68/x - Step 3: Cross multiply
420,202.44x = 630,309.12 × 139,719.68 - Step 4: Simplify right side
420,202.44x = 88,066,588,547.48 - Step 5: Solve for x
x = 88,066,588,547.48/420,202.44 - Step 6: Final answer
x = 209,581.34
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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.