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Finding the Fourth Proportional to 318,573.11, 439,630.95 and 173,379.45

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Solution

The fourth proportional to 318,573.11, 439,630.95 and 173,379.45 is: 239,263.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,573.11 : 439,630.95 = 173,379.45 : x
  2. Step 2: Convert to fraction form
    318,573.11/439,630.95 = 173,379.45/x
  3. Step 3: Cross multiply
    318,573.11x = 439,630.95 × 173,379.45
  4. Step 4: Simplify right side
    318,573.11x = 76,222,972,313.98
  5. Step 5: Solve for x
    x = 76,222,972,313.98/318,573.11
  6. Step 6: Final answer
    x = 239,263.68

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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.