Finding the Fourth Proportional to 388,639.13, 536,307.80 and 216,548.19
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Solution
The fourth proportional to 388,639.13, 536,307.80 and 216,548.19 is: 298,828.59
Step by Step Solution
- Step 1: Write the proportion equation
388,639.13 : 536,307.80 = 216,548.19 : x - Step 2: Convert to fraction form
388,639.13/536,307.80 = 216,548.19/x - Step 3: Cross multiply
388,639.13x = 536,307.80 × 216,548.19 - Step 4: Simplify right side
388,639.13x = 116,136,482,290.14 - Step 5: Solve for x
x = 116,136,482,290.14/388,639.13 - Step 6: Final answer
x = 298,828.59
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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.