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Finding the Fourth Proportional to 318,558.60, 439,619.70 and 173,365.72

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Solution

The fourth proportional to 318,558.60, 439,619.70 and 173,365.72 is: 239,249.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,558.60 : 439,619.70 = 173,365.72 : x
  2. Step 2: Convert to fraction form
    318,558.60/439,619.70 = 173,365.72/x
  3. Step 3: Cross multiply
    318,558.60x = 439,619.70 × 173,365.72
  4. Step 4: Simplify right side
    318,558.60x = 76,214,987,222.40
  5. Step 5: Solve for x
    x = 76,214,987,222.40/318,558.60
  6. Step 6: Final answer
    x = 239,249.50

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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.