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Finding the Fourth Proportional to 329,810.64, 455,139.84 and 178,908.72

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Solution

The fourth proportional to 329,810.64, 455,139.84 and 178,908.72 is: 246,894.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,810.64 : 455,139.84 = 178,908.72 : x
  2. Step 2: Convert to fraction form
    329,810.64/455,139.84 = 178,908.72/x
  3. Step 3: Cross multiply
    329,810.64x = 455,139.84 × 178,908.72
  4. Step 4: Simplify right side
    329,810.64x = 81,428,486,195.40
  5. Step 5: Solve for x
    x = 81,428,486,195.40/329,810.64
  6. Step 6: Final answer
    x = 246,894.66

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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.