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Finding the Fourth Proportional to 290,960.32, 401,478.30 and 163,628.32

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Solution

The fourth proportional to 290,960.32, 401,478.30 and 163,628.32 is: 225,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,960.32 : 401,478.30 = 163,628.32 : x
  2. Step 2: Convert to fraction form
    290,960.32/401,478.30 = 163,628.32/x
  3. Step 3: Cross multiply
    290,960.32x = 401,478.30 × 163,628.32
  4. Step 4: Simplify right side
    290,960.32x = 65,693,219,745.46
  5. Step 5: Solve for x
    x = 65,693,219,745.46/290,960.32
  6. Step 6: Final answer
    x = 225,780.68

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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.