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Finding the Fourth Proportional to 285,785.37, 428,676.84 and 72,555.30

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Solution

The fourth proportional to 285,785.37, 428,676.84 and 72,555.30 is: 108,832.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,785.37 : 428,676.84 = 72,555.30 : x
  2. Step 2: Convert to fraction form
    285,785.37/428,676.84 = 72,555.30/x
  3. Step 3: Cross multiply
    285,785.37x = 428,676.84 × 72,555.30
  4. Step 4: Simplify right side
    285,785.37x = 31,102,776,729.25
  5. Step 5: Solve for x
    x = 31,102,776,729.25/285,785.37
  6. Step 6: Final answer
    x = 108,832.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.