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Finding the Fourth Proportional to 521,668.07, 718,672.92 and 490,279.84

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Solution

The fourth proportional to 521,668.07, 718,672.92 and 490,279.84 is: 675,431.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,668.07 : 718,672.92 = 490,279.84 : x
  2. Step 2: Convert to fraction form
    521,668.07/718,672.92 = 490,279.84/x
  3. Step 3: Cross multiply
    521,668.07x = 718,672.92 × 490,279.84
  4. Step 4: Simplify right side
    521,668.07x = 352,350,840,594.70
  5. Step 5: Solve for x
    x = 352,350,840,594.70/521,668.07
  6. Step 6: Final answer
    x = 675,431.11

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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.