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Finding the Fourth Proportional to 312,640.41, 431,448.72 and 174,834.80

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Solution

The fourth proportional to 312,640.41, 431,448.72 and 174,834.80 is: 241,274.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,640.41 : 431,448.72 = 174,834.80 : x
  2. Step 2: Convert to fraction form
    312,640.41/431,448.72 = 174,834.80/x
  3. Step 3: Cross multiply
    312,640.41x = 431,448.72 × 174,834.80
  4. Step 4: Simplify right side
    312,640.41x = 75,432,250,671.46
  5. Step 5: Solve for x
    x = 75,432,250,671.46/312,640.41
  6. Step 6: Final answer
    x = 241,274.79

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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.