Finding the Fourth Proportional to 390,823.80, 586,430.10 and 154,174.20
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Solution
The fourth proportional to 390,823.80, 586,430.10 and 154,174.20 is: 231,337.99
Step by Step Solution
- Step 1: Write the proportion equation
390,823.80 : 586,430.10 = 154,174.20 : x - Step 2: Convert to fraction form
390,823.80/586,430.10 = 154,174.20/x - Step 3: Cross multiply
390,823.80x = 586,430.10 × 154,174.20 - Step 4: Simplify right side
390,823.80x = 90,412,391,523.42 - Step 5: Solve for x
x = 90,412,391,523.42/390,823.80 - Step 6: Final answer
x = 231,337.99
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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.