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Finding the Fourth Proportional to 313,638.72, 432,842.84 and 177,673.78

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Solution

The fourth proportional to 313,638.72, 432,842.84 and 177,673.78 is: 245,201.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,638.72 : 432,842.84 = 177,673.78 : x
  2. Step 2: Convert to fraction form
    313,638.72/432,842.84 = 177,673.78/x
  3. Step 3: Cross multiply
    313,638.72x = 432,842.84 × 177,673.78
  4. Step 4: Simplify right side
    313,638.72x = 76,904,823,528.74
  5. Step 5: Solve for x
    x = 76,904,823,528.74/313,638.72
  6. Step 6: Final answer
    x = 245,201.94

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1.5x scale

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.