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Finding the Fourth Proportional to 318,438.80, 439,449.02 and 173,245.40

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Solution

The fourth proportional to 318,438.80, 439,449.02 and 173,245.40 is: 239,080.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,438.80 : 439,449.02 = 173,245.40 : x
  2. Step 2: Convert to fraction form
    318,438.80/439,449.02 = 173,245.40/x
  3. Step 3: Cross multiply
    318,438.80x = 439,449.02 × 173,245.40
  4. Step 4: Simplify right side
    318,438.80x = 76,132,521,249.51
  5. Step 5: Solve for x
    x = 76,132,521,249.51/318,438.80
  6. Step 6: Final answer
    x = 239,080.54

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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.