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Finding the Fourth Proportional to 424,725.86, 637,187.31 and 140,399.17

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Solution

The fourth proportional to 424,725.86, 637,187.31 and 140,399.17 is: 210,631.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,725.86 : 637,187.31 = 140,399.17 : x
  2. Step 2: Convert to fraction form
    424,725.86/637,187.31 = 140,399.17/x
  3. Step 3: Cross multiply
    424,725.86x = 637,187.31 × 140,399.17
  4. Step 4: Simplify right side
    424,725.86x = 89,460,567,865.56
  5. Step 5: Solve for x
    x = 89,460,567,865.56/424,725.86
  6. Step 6: Final answer
    x = 210,631.32

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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.