Finding the Fourth Proportional to 390,964.71, 586,495.36 and 138,193.07
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Solution
The fourth proportional to 390,964.71, 586,495.36 and 138,193.07 is: 207,306.68
Step by Step Solution
- Step 1: Write the proportion equation
390,964.71 : 586,495.36 = 138,193.07 : x - Step 2: Convert to fraction form
390,964.71/586,495.36 = 138,193.07/x - Step 3: Cross multiply
390,964.71x = 586,495.36 × 138,193.07 - Step 4: Simplify right side
390,964.71x = 81,049,594,489.79 - Step 5: Solve for x
x = 81,049,594,489.79/390,964.71 - Step 6: Final answer
x = 207,306.68
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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.