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Finding the Fourth Proportional to 391,416.94, 587,358.69 and 142,118.38

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Solution

The fourth proportional to 391,416.94, 587,358.69 and 142,118.38 is: 213,262.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,416.94 : 587,358.69 = 142,118.38 : x
  2. Step 2: Convert to fraction form
    391,416.94/587,358.69 = 142,118.38/x
  3. Step 3: Cross multiply
    391,416.94x = 587,358.69 × 142,118.38
  4. Step 4: Simplify right side
    391,416.94x = 83,474,465,501.72
  5. Step 5: Solve for x
    x = 83,474,465,501.72/391,416.94
  6. Step 6: Final answer
    x = 213,262.27

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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.