Finding the Fourth Proportional to 645,259.81, 890,680.05 and 390,611.08
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Solution
The fourth proportional to 645,259.81, 890,680.05 and 390,611.08 is: 539,177.38
Step by Step Solution
- Step 1: Write the proportion equation
645,259.81 : 890,680.05 = 390,611.08 : x - Step 2: Convert to fraction form
645,259.81/890,680.05 = 390,611.08/x - Step 3: Cross multiply
645,259.81x = 890,680.05 × 390,611.08 - Step 4: Simplify right side
645,259.81x = 347,909,496,264.95 - Step 5: Solve for x
x = 347,909,496,264.95/645,259.81 - Step 6: Final answer
x = 539,177.38
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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.