Finding the Fourth Proportional to 645,153.74, 890,315.62 and 354,784.02
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Solution
The fourth proportional to 645,153.74, 890,315.62 and 354,784.02 is: 489,603.85
Step by Step Solution
- Step 1: Write the proportion equation
645,153.74 : 890,315.62 = 354,784.02 : x - Step 2: Convert to fraction form
645,153.74/890,315.62 = 354,784.02/x - Step 3: Cross multiply
645,153.74x = 890,315.62 × 354,784.02 - Step 4: Simplify right side
645,153.74x = 315,869,754,732.39 - Step 5: Solve for x
x = 315,869,754,732.39/645,153.74 - Step 6: Final answer
x = 489,603.85
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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.