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Finding the Fourth Proportional to 312,636.40, 431,432.60 and 176,667.44

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Solution

The fourth proportional to 312,636.40, 431,432.60 and 176,667.44 is: 243,797.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,636.40 : 431,432.60 = 176,667.44 : x
  2. Step 2: Convert to fraction form
    312,636.40/431,432.60 = 176,667.44/x
  3. Step 3: Cross multiply
    312,636.40x = 431,432.60 × 176,667.44
  4. Step 4: Simplify right side
    312,636.40x = 76,220,089,934.04
  5. Step 5: Solve for x
    x = 76,220,089,934.04/312,636.40
  6. Step 6: Final answer
    x = 243,797.88

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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.