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Finding the Fourth Proportional to 425,898.51, 638,709.48 and 141,512.68

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Solution

The fourth proportional to 425,898.51, 638,709.48 and 141,512.68 is: 212,223.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,898.51 : 638,709.48 = 141,512.68 : x
  2. Step 2: Convert to fraction form
    425,898.51/638,709.48 = 141,512.68/x
  3. Step 3: Cross multiply
    425,898.51x = 638,709.48 × 141,512.68
  4. Step 4: Simplify right side
    425,898.51x = 90,385,491,554.77
  5. Step 5: Solve for x
    x = 90,385,491,554.77/425,898.51
  6. Step 6: Final answer
    x = 212,223.08

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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.