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Finding the Fourth Proportional to 313,628.90, 432,809.96 and 170,388.90

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Solution

The fourth proportional to 313,628.90, 432,809.96 and 170,388.90 is: 235,137.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,628.90 : 432,809.96 = 170,388.90 : x
  2. Step 2: Convert to fraction form
    313,628.90/432,809.96 = 170,388.90/x
  3. Step 3: Cross multiply
    313,628.90x = 432,809.96 × 170,388.90
  4. Step 4: Simplify right side
    313,628.90x = 73,746,012,993.44
  5. Step 5: Solve for x
    x = 73,746,012,993.44/313,628.90
  6. Step 6: Final answer
    x = 235,137.81

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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.