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Finding the Fourth Proportional to 318,408.20, 439,400.16 and 175,168.40

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Solution

The fourth proportional to 318,408.20, 439,400.16 and 175,168.40 is: 241,730.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,408.20 : 439,400.16 = 175,168.40 : x
  2. Step 2: Convert to fraction form
    318,408.20/439,400.16 = 175,168.40/x
  3. Step 3: Cross multiply
    318,408.20x = 439,400.16 × 175,168.40
  4. Step 4: Simplify right side
    318,408.20x = 76,969,022,986.94
  5. Step 5: Solve for x
    x = 76,969,022,986.94/318,408.20
  6. Step 6: Final answer
    x = 241,730.66

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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.