Finding the Fourth Proportional to 420,387.05, 630,829.58 and 393,788.81
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Solution
The fourth proportional to 420,387.05, 630,829.58 and 393,788.81 is: 590,916.46
Step by Step Solution
- Step 1: Write the proportion equation
420,387.05 : 630,829.58 = 393,788.81 : x - Step 2: Convert to fraction form
420,387.05/630,829.58 = 393,788.81/x - Step 3: Cross multiply
420,387.05x = 630,829.58 × 393,788.81 - Step 4: Simplify right side
420,387.05x = 248,413,624,497.91 - Step 5: Solve for x
x = 248,413,624,497.91/420,387.05 - Step 6: Final answer
x = 590,916.46
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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.