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Finding the Fourth Proportional to 508,971.21, 763,540.65 and 172,032.27

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Solution

The fourth proportional to 508,971.21, 763,540.65 and 172,032.27 is: 258,076.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,971.21 : 763,540.65 = 172,032.27 : x
  2. Step 2: Convert to fraction form
    508,971.21/763,540.65 = 172,032.27/x
  3. Step 3: Cross multiply
    508,971.21x = 763,540.65 × 172,032.27
  4. Step 4: Simplify right side
    508,971.21x = 131,353,631,256.78
  5. Step 5: Solve for x
    x = 131,353,631,256.78/508,971.21
  6. Step 6: Final answer
    x = 258,076.74

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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.