Finding the Fourth Proportional to 390,485.74, 585,059.95 and 213,117.21
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Solution
The fourth proportional to 390,485.74, 585,059.95 and 213,117.21 is: 319,310.88
Step by Step Solution
- Step 1: Write the proportion equation
390,485.74 : 585,059.95 = 213,117.21 : x - Step 2: Convert to fraction form
390,485.74/585,059.95 = 213,117.21/x - Step 3: Cross multiply
390,485.74x = 585,059.95 × 213,117.21 - Step 4: Simplify right side
390,485.74x = 124,686,344,226.74 - Step 5: Solve for x
x = 124,686,344,226.74/390,485.74 - Step 6: Final answer
x = 319,310.88
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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.