Finding the Fourth Proportional to 913.36, 1,369.08 and 426
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Solution
The fourth proportional to 913.36, 1,369.08 and 426 is: 638.55
Step by Step Solution
- Step 1: Write the proportion equation
913.36 : 1,369.08 = 426 : x - Step 2: Convert to fraction form
913.36/1,369.08 = 426/x - Step 3: Cross multiply
913.36x = 1,369.08 × 426 - Step 4: Simplify right side
913.36x = 583,228.08 - Step 5: Solve for x
x = 583,228.08/913.36 - Step 6: Final answer
x = 638.55
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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.