Finding the Fourth Proportional to 1,225,863,302.16, 1,691,727,085.32 and 668,982,220.68
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Solution
The fourth proportional to 1,225,863,302.16, 1,691,727,085.32 and 668,982,220.68 is: 923,214,962.33
Step by Step Solution
- Step 1: Write the proportion equation
1,225,863,302.16 : 1,691,727,085.32 = 668,982,220.68 : x - Step 2: Convert to fraction form
1,225,863,302.16/1,691,727,085.32 = 668,982,220.68/x - Step 3: Cross multiply
1,225,863,302.16x = 1,691,727,085.32 × 668,982,220.68 - Step 4: Simplify right side
1,225,863,302.16x = 1,131,735,342,321,877,248 - Step 5: Solve for x
x = 1,131,735,342,321,877,248/1,225,863,302.16 - Step 6: Final answer
x = 923,214,962.33
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Double scale
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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.