Finding the Fourth Proportional to 425,887,687.80, 638,831,531.70 and 272,832,679.80
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Solution
The fourth proportional to 425,887,687.80, 638,831,531.70 and 272,832,679.80 is: 409,249,019.70
Step by Step Solution
- Step 1: Write the proportion equation
425,887,687.80 : 638,831,531.70 = 272,832,679.80 : x - Step 2: Convert to fraction form
425,887,687.80/638,831,531.70 = 272,832,679.80/x - Step 3: Cross multiply
425,887,687.80x = 638,831,531.70 × 272,832,679.80 - Step 4: Simplify right side
425,887,687.80x = 174,294,118,734,449,664 - Step 5: Solve for x
x = 174,294,118,734,449,664/425,887,687.80 - Step 6: Final answer
x = 409,249,019.70
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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.