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Finding the Fourth Proportional to 331,215.40, 462,651.80 and 331,215.40

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Solution

The fourth proportional to 331,215.40, 462,651.80 and 331,215.40 is: 462,651.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,215.40 : 462,651.80 = 331,215.40 : x
  2. Step 2: Convert to fraction form
    331,215.40/462,651.80 = 331,215.40/x
  3. Step 3: Cross multiply
    331,215.40x = 462,651.80 × 331,215.40
  4. Step 4: Simplify right side
    331,215.40x = 153,237,400,997.72
  5. Step 5: Solve for x
    x = 153,237,400,997.72/331,215.40
  6. Step 6: Final answer
    x = 462,651.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.