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Finding the Fourth Proportional to 323,968.90, 485,780.55 and 136,768.90

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Solution

The fourth proportional to 323,968.90, 485,780.55 and 136,768.90 is: 205,080.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,968.90 : 485,780.55 = 136,768.90 : x
  2. Step 2: Convert to fraction form
    323,968.90/485,780.55 = 136,768.90/x
  3. Step 3: Cross multiply
    323,968.90x = 485,780.55 × 136,768.90
  4. Step 4: Simplify right side
    323,968.90x = 66,439,671,464.90
  5. Step 5: Solve for x
    x = 66,439,671,464.90/323,968.90
  6. Step 6: Final answer
    x = 205,080.40

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1.5x scale

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.