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Finding the Fourth Proportional to 522,245.16, 720,826.53 and 318,408.48

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Solution

The fourth proportional to 522,245.16, 720,826.53 and 318,408.48 is: 439,481.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,245.16 : 720,826.53 = 318,408.48 : x
  2. Step 2: Convert to fraction form
    522,245.16/720,826.53 = 318,408.48/x
  3. Step 3: Cross multiply
    522,245.16x = 720,826.53 × 318,408.48
  4. Step 4: Simplify right side
    522,245.16x = 229,517,280,923.89
  5. Step 5: Solve for x
    x = 229,517,280,923.89/522,245.16
  6. Step 6: Final answer
    x = 439,481.87

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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.