Finding the Fourth Proportional to 1,136, 1,567.68 and 638.63
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Solution
The fourth proportional to 1,136, 1,567.68 and 638.63 is: 881.31
Step by Step Solution
- Step 1: Write the proportion equation
1,136 : 1,567.68 = 638.63 : x - Step 2: Convert to fraction form
1,136/1,567.68 = 638.63/x - Step 3: Cross multiply
1,136x = 1,567.68 × 638.63 - Step 4: Simplify right side
1,136x = 1,001,167.48 - Step 5: Solve for x
x = 1,001,167.48/1,136 - Step 6: Final answer
x = 881.31
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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.