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Finding the Fourth Proportional to 422,389.60, 633,691.72 and 122,870.16

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Solution

The fourth proportional to 422,389.60, 633,691.72 and 122,870.16 is: 184,336.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,389.60 : 633,691.72 = 122,870.16 : x
  2. Step 2: Convert to fraction form
    422,389.60/633,691.72 = 122,870.16/x
  3. Step 3: Cross multiply
    422,389.60x = 633,691.72 × 122,870.16
  4. Step 4: Simplify right side
    422,389.60x = 77,861,803,027.08
  5. Step 5: Solve for x
    x = 77,861,803,027.08/422,389.60
  6. Step 6: Final answer
    x = 184,336.46

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.