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Finding the Fourth Proportional to 329,885.51, 455,106.67 and 200,720.43

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Solution

The fourth proportional to 329,885.51, 455,106.67 and 200,720.43 is: 276,911.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,885.51 : 455,106.67 = 200,720.43 : x
  2. Step 2: Convert to fraction form
    329,885.51/455,106.67 = 200,720.43/x
  3. Step 3: Cross multiply
    329,885.51x = 455,106.67 × 200,720.43
  4. Step 4: Simplify right side
    329,885.51x = 91,349,208,455.82
  5. Step 5: Solve for x
    x = 91,349,208,455.82/329,885.51
  6. Step 6: Final answer
    x = 276,911.86

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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.