Finding the Fourth Proportional to 645,201.18, 890,352.27 and 358,700.40
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Solution
The fourth proportional to 645,201.18, 890,352.27 and 358,700.40 is: 494,992.45
Step by Step Solution
- Step 1: Write the proportion equation
645,201.18 : 890,352.27 = 358,700.40 : x - Step 2: Convert to fraction form
645,201.18/890,352.27 = 358,700.40/x - Step 3: Cross multiply
645,201.18x = 890,352.27 × 358,700.40 - Step 4: Simplify right side
645,201.18x = 319,369,715,389.91 - Step 5: Solve for x
x = 319,369,715,389.91/645,201.18 - Step 6: Final answer
x = 494,992.45
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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.