Home / 287,906.72-397,339.32-215,183.12

Finding the Fourth Proportional to 287,906.72, 397,339.32 and 215,183.12

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Solution

The fourth proportional to 287,906.72, 397,339.32 and 215,183.12 is: 296,973.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,906.72 : 397,339.32 = 215,183.12 : x
  2. Step 2: Convert to fraction form
    287,906.72/397,339.32 = 215,183.12/x
  3. Step 3: Cross multiply
    287,906.72x = 397,339.32 × 215,183.12
  4. Step 4: Simplify right side
    287,906.72x = 85,500,714,576.28
  5. Step 5: Solve for x
    x = 85,500,714,576.28/287,906.72
  6. Step 6: Final answer
    x = 296,973.67

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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.