Finding the Fourth Proportional to 645,106.88, 890,277.88 and 358,631.75
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Solution
The fourth proportional to 645,106.88, 890,277.88 and 358,631.75 is: 494,928.71
Step by Step Solution
- Step 1: Write the proportion equation
645,106.88 : 890,277.88 = 358,631.75 : x - Step 2: Convert to fraction form
645,106.88/890,277.88 = 358,631.75/x - Step 3: Cross multiply
645,106.88x = 890,277.88 × 358,631.75 - Step 4: Simplify right side
645,106.88x = 319,281,913,194.11 - Step 5: Solve for x
x = 319,281,913,194.11/645,106.88 - Step 6: Final answer
x = 494,928.71
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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.