Finding the Fourth Proportional to 427,354,642.87, 637,438,925.02 and 388,122,339.66
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Solution
The fourth proportional to 427,354,642.87, 637,438,925.02 and 388,122,339.66 is: 578,920,320.85
Step by Step Solution
- Step 1: Write the proportion equation
427,354,642.87 : 637,438,925.02 = 388,122,339.66 : x - Step 2: Convert to fraction form
427,354,642.87/637,438,925.02 = 388,122,339.66/x - Step 3: Cross multiply
427,354,642.87x = 637,438,925.02 × 388,122,339.66 - Step 4: Simplify right side
427,354,642.87x = 247,404,286,969,117,728 - Step 5: Solve for x
x = 247,404,286,969,117,728/427,354,642.87 - Step 6: Final answer
x = 578,920,320.85
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.