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Finding the Fourth Proportional to 305,809.32, 422,011.50 and 169,838.06

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Solution

The fourth proportional to 305,809.32, 422,011.50 and 169,838.06 is: 234,373.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,809.32 : 422,011.50 = 169,838.06 : x
  2. Step 2: Convert to fraction form
    305,809.32/422,011.50 = 169,838.06/x
  3. Step 3: Cross multiply
    305,809.32x = 422,011.50 × 169,838.06
  4. Step 4: Simplify right side
    305,809.32x = 71,673,614,457.69
  5. Step 5: Solve for x
    x = 71,673,614,457.69/305,809.32
  6. Step 6: Final answer
    x = 234,373.55

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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.