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Finding the Fourth Proportional to 390,668.16, 585,396 and 270,958.80

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Solution

The fourth proportional to 390,668.16, 585,396 and 270,958.80 is: 406,017.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,668.16 : 585,396 = 270,958.80 : x
  2. Step 2: Convert to fraction form
    390,668.16/585,396 = 270,958.80/x
  3. Step 3: Cross multiply
    390,668.16x = 585,396 × 270,958.80
  4. Step 4: Simplify right side
    390,668.16x = 158,618,197,684.80
  5. Step 5: Solve for x
    x = 158,618,197,684.80/390,668.16
  6. Step 6: Final answer
    x = 406,017.73

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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.