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Finding the Fourth Proportional to 449,784.72, 620,642.92 and 288,857.57

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Solution

The fourth proportional to 449,784.72, 620,642.92 and 288,857.57 is: 398,584.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,784.72 : 620,642.92 = 288,857.57 : x
  2. Step 2: Convert to fraction form
    449,784.72/620,642.92 = 288,857.57/x
  3. Step 3: Cross multiply
    449,784.72x = 620,642.92 × 288,857.57
  4. Step 4: Simplify right side
    449,784.72x = 179,277,405,708.90
  5. Step 5: Solve for x
    x = 179,277,405,708.90/449,784.72
  6. Step 6: Final answer
    x = 398,584.92

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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.