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Finding the Fourth Proportional to 630,643.20, 945,402.30 and 231,190.71

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Solution

The fourth proportional to 630,643.20, 945,402.30 and 231,190.71 is: 346,579.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,643.20 : 945,402.30 = 231,190.71 : x
  2. Step 2: Convert to fraction form
    630,643.20/945,402.30 = 231,190.71/x
  3. Step 3: Cross multiply
    630,643.20x = 945,402.30 × 231,190.71
  4. Step 4: Simplify right side
    630,643.20x = 218,568,228,972.63
  5. Step 5: Solve for x
    x = 218,568,228,972.63/630,643.20
  6. Step 6: Final answer
    x = 346,579.86

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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.