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Finding the Fourth Proportional to 313,635.54, 432,819.12 and 170,395.55

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Solution

The fourth proportional to 313,635.54, 432,819.12 and 170,395.55 is: 235,146.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,635.54 : 432,819.12 = 170,395.55 : x
  2. Step 2: Convert to fraction form
    313,635.54/432,819.12 = 170,395.55/x
  3. Step 3: Cross multiply
    313,635.54x = 432,819.12 × 170,395.55
  4. Step 4: Simplify right side
    313,635.54x = 73,750,449,838.82
  5. Step 5: Solve for x
    x = 73,750,449,838.82/313,635.54
  6. Step 6: Final answer
    x = 235,146.98

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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.