Finding the Fourth Proportional to 399,139.80, 598,709.70 and 399,139.80
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Solution
The fourth proportional to 399,139.80, 598,709.70 and 399,139.80 is: 598,709.70
Step by Step Solution
- Step 1: Write the proportion equation
399,139.80 : 598,709.70 = 399,139.80 : x - Step 2: Convert to fraction form
399,139.80/598,709.70 = 399,139.80/x - Step 3: Cross multiply
399,139.80x = 598,709.70 × 399,139.80 - Step 4: Simplify right side
399,139.80x = 238,968,869,916.06 - Step 5: Solve for x
x = 238,968,869,916.06/399,139.80 - Step 6: Final answer
x = 598,709.70
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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.