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Finding the Fourth Proportional to 352,814.70, 486,926.02 and 209,575.31

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Solution

The fourth proportional to 352,814.70, 486,926.02 and 209,575.31 is: 289,238.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,814.70 : 486,926.02 = 209,575.31 : x
  2. Step 2: Convert to fraction form
    352,814.70/486,926.02 = 209,575.31/x
  3. Step 3: Cross multiply
    352,814.70x = 486,926.02 × 209,575.31
  4. Step 4: Simplify right side
    352,814.70x = 102,047,671,588.57
  5. Step 5: Solve for x
    x = 102,047,671,588.57/352,814.70
  6. Step 6: Final answer
    x = 289,238.72

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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.