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Finding the Fourth Proportional to 425,700, 638,550.24 and 130,212

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Solution

The fourth proportional to 425,700, 638,550.24 and 130,212 is: 195,318.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,700 : 638,550.24 = 130,212 : x
  2. Step 2: Convert to fraction form
    425,700/638,550.24 = 130,212/x
  3. Step 3: Cross multiply
    425,700x = 638,550.24 × 130,212
  4. Step 4: Simplify right side
    425,700x = 83,146,903,850.88
  5. Step 5: Solve for x
    x = 83,146,903,850.88/425,700
  6. Step 6: Final answer
    x = 195,318.07

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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.