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Finding the Fourth Proportional to 352,468.90, 486,659.91 and 216,685

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Solution

The fourth proportional to 352,468.90, 486,659.91 and 216,685 is: 299,180.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,468.90 : 486,659.91 = 216,685 : x
  2. Step 2: Convert to fraction form
    352,468.90/486,659.91 = 216,685/x
  3. Step 3: Cross multiply
    352,468.90x = 486,659.91 × 216,685
  4. Step 4: Simplify right side
    352,468.90x = 105,451,902,598.35
  5. Step 5: Solve for x
    x = 105,451,902,598.35/352,468.90
  6. Step 6: Final answer
    x = 299,180.73

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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.