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Finding the Fourth Proportional to 306,346.80, 422,754.84 and 172,210.80

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Solution

The fourth proportional to 306,346.80, 422,754.84 and 172,210.80 is: 237,648.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,346.80 : 422,754.84 = 172,210.80 : x
  2. Step 2: Convert to fraction form
    306,346.80/422,754.84 = 172,210.80/x
  3. Step 3: Cross multiply
    306,346.80x = 422,754.84 × 172,210.80
  4. Step 4: Simplify right side
    306,346.80x = 72,802,949,200.27
  5. Step 5: Solve for x
    x = 72,802,949,200.27/306,346.80
  6. Step 6: Final answer
    x = 237,648.80

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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.