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Finding the Fourth Proportional to 285,352.74, 428,100.12 and 85,676.67

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Solution

The fourth proportional to 285,352.74, 428,100.12 and 85,676.67 is: 128,536.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,352.74 : 428,100.12 = 85,676.67 : x
  2. Step 2: Convert to fraction form
    285,352.74/428,100.12 = 85,676.67/x
  3. Step 3: Cross multiply
    285,352.74x = 428,100.12 × 85,676.67
  4. Step 4: Simplify right side
    285,352.74x = 36,678,192,708.20
  5. Step 5: Solve for x
    x = 36,678,192,708.20/285,352.74
  6. Step 6: Final answer
    x = 128,536.33

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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.