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Finding the Fourth Proportional to 391,412.94, 587,352.69 and 142,114.38

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Solution

The fourth proportional to 391,412.94, 587,352.69 and 142,114.38 is: 213,256.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,412.94 : 587,352.69 = 142,114.38 : x
  2. Step 2: Convert to fraction form
    391,412.94/587,352.69 = 142,114.38/x
  3. Step 3: Cross multiply
    391,412.94x = 587,352.69 × 142,114.38
  4. Step 4: Simplify right side
    391,412.94x = 83,471,263,380.68
  5. Step 5: Solve for x
    x = 83,471,263,380.68/391,412.94
  6. Step 6: Final answer
    x = 213,256.27

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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.