Finding the Fourth Proportional to 645,258.70, 890,454.09 and 358,761.70
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Solution
The fourth proportional to 645,258.70, 890,454.09 and 358,761.70 is: 495,089.52
Step by Step Solution
- Step 1: Write the proportion equation
645,258.70 : 890,454.09 = 358,761.70 : x - Step 2: Convert to fraction form
645,258.70/890,454.09 = 358,761.70/x - Step 3: Cross multiply
645,258.70x = 890,454.09 × 358,761.70 - Step 4: Simplify right side
645,258.70x = 319,460,823,100.35 - Step 5: Solve for x
x = 319,460,823,100.35/645,258.70 - Step 6: Final answer
x = 495,089.52
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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.