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Finding the Fourth Proportional to 306,633.60, 423,144 and 172,471.68

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Solution

The fourth proportional to 306,633.60, 423,144 and 172,471.68 is: 238,005.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,633.60 : 423,144 = 172,471.68 : x
  2. Step 2: Convert to fraction form
    306,633.60/423,144 = 172,471.68/x
  3. Step 3: Cross multiply
    306,633.60x = 423,144 × 172,471.68
  4. Step 4: Simplify right side
    306,633.60x = 72,980,356,561.92
  5. Step 5: Solve for x
    x = 72,980,356,561.92/306,633.60
  6. Step 6: Final answer
    x = 238,005.09

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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.