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Finding the Fourth Proportional to 391,995.60, 587,118.60 and 302,960.40

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Solution

The fourth proportional to 391,995.60, 587,118.60 and 302,960.40 is: 453,764.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,995.60 : 587,118.60 = 302,960.40 : x
  2. Step 2: Convert to fraction form
    391,995.60/587,118.60 = 302,960.40/x
  3. Step 3: Cross multiply
    391,995.60x = 587,118.60 × 302,960.40
  4. Step 4: Simplify right side
    391,995.60x = 177,873,685,903.44
  5. Step 5: Solve for x
    x = 177,873,685,903.44/391,995.60
  6. Step 6: Final answer
    x = 453,764.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.