Finding the Fourth Proportional to 399,639.15, 551,495.58 and 218,347.19
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Solution
The fourth proportional to 399,639.15, 551,495.58 and 218,347.19 is: 301,315.59
Step by Step Solution
- Step 1: Write the proportion equation
399,639.15 : 551,495.58 = 218,347.19 : x - Step 2: Convert to fraction form
399,639.15/551,495.58 = 218,347.19/x - Step 3: Cross multiply
399,639.15x = 551,495.58 × 218,347.19 - Step 4: Simplify right side
399,639.15x = 120,417,507,432.94 - Step 5: Solve for x
x = 120,417,507,432.94/399,639.15 - Step 6: Final answer
x = 301,315.59
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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.