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Finding the Fourth Proportional to 306,695.20, 423,251.52 and 170,735.20

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Solution

The fourth proportional to 306,695.20, 423,251.52 and 170,735.20 is: 235,621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,695.20 : 423,251.52 = 170,735.20 : x
  2. Step 2: Convert to fraction form
    306,695.20/423,251.52 = 170,735.20/x
  3. Step 3: Cross multiply
    306,695.20x = 423,251.52 × 170,735.20
  4. Step 4: Simplify right side
    306,695.20x = 72,263,932,917.50
  5. Step 5: Solve for x
    x = 72,263,932,917.50/306,695.20
  6. Step 6: Final answer
    x = 235,621.34

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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.