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Finding the Fourth Proportional to 490,942.56, 677,167.56 and 318,552.48

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Solution

The fourth proportional to 490,942.56, 677,167.56 and 318,552.48 is: 439,386.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,942.56 : 677,167.56 = 318,552.48 : x
  2. Step 2: Convert to fraction form
    490,942.56/677,167.56 = 318,552.48/x
  3. Step 3: Cross multiply
    490,942.56x = 677,167.56 × 318,552.48
  4. Step 4: Simplify right side
    490,942.56x = 215,713,405,613.55
  5. Step 5: Solve for x
    x = 215,713,405,613.55/490,942.56
  6. Step 6: Final answer
    x = 439,386.24

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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.