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Finding the Fourth Proportional to 424,640.36, 637,044.06 and 140,319.44

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Solution

The fourth proportional to 424,640.36, 637,044.06 and 140,319.44 is: 210,506.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,640.36 : 637,044.06 = 140,319.44 : x
  2. Step 2: Convert to fraction form
    424,640.36/637,044.06 = 140,319.44/x
  3. Step 3: Cross multiply
    424,640.36x = 637,044.06 × 140,319.44
  4. Step 4: Simplify right side
    424,640.36x = 89,389,665,754.53
  5. Step 5: Solve for x
    x = 89,389,665,754.53/424,640.36
  6. Step 6: Final answer
    x = 210,506.76

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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.