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Finding the Fourth Proportional to 425,412.27, 638,210.67 and 125,913.89

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Solution

The fourth proportional to 425,412.27, 638,210.67 and 125,913.89 is: 188,898.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,412.27 : 638,210.67 = 125,913.89 : x
  2. Step 2: Convert to fraction form
    425,412.27/638,210.67 = 125,913.89/x
  3. Step 3: Cross multiply
    425,412.27x = 638,210.67 × 125,913.89
  4. Step 4: Simplify right side
    425,412.27x = 80,359,589,222.56
  5. Step 5: Solve for x
    x = 80,359,589,222.56/425,412.27
  6. Step 6: Final answer
    x = 188,898.15

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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.