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Finding the Fourth Proportional to 286,673.46, 430,012.80 and 86,993.85

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Solution

The fourth proportional to 286,673.46, 430,012.80 and 86,993.85 is: 130,491.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,673.46 : 430,012.80 = 86,993.85 : x
  2. Step 2: Convert to fraction form
    286,673.46/430,012.80 = 86,993.85/x
  3. Step 3: Cross multiply
    286,673.46x = 430,012.80 × 86,993.85
  4. Step 4: Simplify right side
    286,673.46x = 37,408,469,021.28
  5. Step 5: Solve for x
    x = 37,408,469,021.28/286,673.46
  6. Step 6: Final answer
    x = 130,491.57

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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.