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Finding the Fourth Proportional to 391,421.44, 587,131.08 and 110,941.12

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Solution

The fourth proportional to 391,421.44, 587,131.08 and 110,941.12 is: 166,411.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,421.44 : 587,131.08 = 110,941.12 : x
  2. Step 2: Convert to fraction form
    391,421.44/587,131.08 = 110,941.12/x
  3. Step 3: Cross multiply
    391,421.44x = 587,131.08 × 110,941.12
  4. Step 4: Simplify right side
    391,421.44x = 65,136,979,602.01
  5. Step 5: Solve for x
    x = 65,136,979,602.01/391,421.44
  6. Step 6: Final answer
    x = 166,411.37

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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.