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Finding the Fourth Proportional to 306,358.48, 422,812.68 and 172,222.48

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Solution

The fourth proportional to 306,358.48, 422,812.68 and 172,222.48 is: 237,688.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,358.48 : 422,812.68 = 172,222.48 : x
  2. Step 2: Convert to fraction form
    306,358.48/422,812.68 = 172,222.48/x
  3. Step 3: Cross multiply
    306,358.48x = 422,812.68 × 172,222.48
  4. Step 4: Simplify right side
    306,358.48x = 72,817,848,325.05
  5. Step 5: Solve for x
    x = 72,817,848,325.05/306,358.48
  6. Step 6: Final answer
    x = 237,688.37

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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.