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Finding the Fourth Proportional to 424,945.68, 637,509.48 and 172,223.28

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Solution

The fourth proportional to 424,945.68, 637,509.48 and 172,223.28 is: 258,371.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    424,945.68 : 637,509.48 = 172,223.28 : x
  2. Step 2: Convert to fraction form
    424,945.68/637,509.48 = 172,223.28/x
  3. Step 3: Cross multiply
    424,945.68x = 637,509.48 × 172,223.28
  4. Step 4: Simplify right side
    424,945.68x = 109,793,973,676.69
  5. Step 5: Solve for x
    x = 109,793,973,676.69/424,945.68
  6. Step 6: Final answer
    x = 258,371.78

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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.