Finding the Fourth Proportional to 876,364,918.79, 1,313,402,787.12 and 668,341,639.55
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Solution
The fourth proportional to 876,364,918.79, 1,313,402,787.12 and 668,341,639.55 is: 1,001,639,560.56
Step by Step Solution
- Step 1: Write the proportion equation
876,364,918.79 : 1,313,402,787.12 = 668,341,639.55 : x - Step 2: Convert to fraction form
876,364,918.79/1,313,402,787.12 = 668,341,639.55/x - Step 3: Cross multiply
876,364,918.79x = 1,313,402,787.12 × 668,341,639.55 - Step 4: Simplify right side
876,364,918.79x = 877,801,772,139,103,104 - Step 5: Solve for x
x = 877,801,772,139,103,104/876,364,918.79 - Step 6: Final answer
x = 1,001,639,560.56
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.