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Finding the Fourth Proportional to 420,025.72, 629,785.20 and 167,345.16

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Solution

The fourth proportional to 420,025.72, 629,785.20 and 167,345.16 is: 250,916.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,025.72 : 629,785.20 = 167,345.16 : x
  2. Step 2: Convert to fraction form
    420,025.72/629,785.20 = 167,345.16/x
  3. Step 3: Cross multiply
    420,025.72x = 629,785.20 × 167,345.16
  4. Step 4: Simplify right side
    420,025.72x = 105,391,505,059.63
  5. Step 5: Solve for x
    x = 105,391,505,059.63/420,025.72
  6. Step 6: Final answer
    x = 250,916.79

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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.