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Finding the Fourth Proportional to 312,660, 431,827.20 and 211,883.04

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Solution

The fourth proportional to 312,660, 431,827.20 and 211,883.04 is: 292,640.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,660 : 431,827.20 = 211,883.04 : x
  2. Step 2: Convert to fraction form
    312,660/431,827.20 = 211,883.04/x
  3. Step 3: Cross multiply
    312,660x = 431,827.20 × 211,883.04
  4. Step 4: Simplify right side
    312,660x = 91,496,859,890.69
  5. Step 5: Solve for x
    x = 91,496,859,890.69/312,660
  6. Step 6: Final answer
    x = 292,640.12

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1.5x scale

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.