Finding the Fourth Proportional to 918.62, 1,378 and 507.95
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Solution
The fourth proportional to 918.62, 1,378 and 507.95 is: 761.96
Step by Step Solution
- Step 1: Write the proportion equation
918.62 : 1,378 = 507.95 : x - Step 2: Convert to fraction form
918.62/1,378 = 507.95/x - Step 3: Cross multiply
918.62x = 1,378 × 507.95 - Step 4: Simplify right side
918.62x = 699,955.10 - Step 5: Solve for x
x = 699,955.10/918.62 - Step 6: Final answer
x = 761.96
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.