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Finding the Fourth Proportional to 315,792.72, 435,775.68 and 172,553.94

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Solution

The fourth proportional to 315,792.72, 435,775.68 and 172,553.94 is: 238,114.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,792.72 : 435,775.68 = 172,553.94 : x
  2. Step 2: Convert to fraction form
    315,792.72/435,775.68 = 172,553.94/x
  3. Step 3: Cross multiply
    315,792.72x = 435,775.68 × 172,553.94
  4. Step 4: Simplify right side
    315,792.72x = 75,194,810,540.18
  5. Step 5: Solve for x
    x = 75,194,810,540.18/315,792.72
  6. Step 6: Final answer
    x = 238,114.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.