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Finding the Fourth Proportional to 340,446, 510,669 and 91,128

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Solution

The fourth proportional to 340,446, 510,669 and 91,128 is: 136,692

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,446 : 510,669 = 91,128 : x
  2. Step 2: Convert to fraction form
    340,446/510,669 = 91,128/x
  3. Step 3: Cross multiply
    340,446x = 510,669 × 91,128
  4. Step 4: Simplify right side
    340,446x = 46,536,244,632
  5. Step 5: Solve for x
    x = 46,536,244,632/340,446
  6. Step 6: Final answer
    x = 136,692

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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.