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Finding the Fourth Proportional to 638.31, 875.61 and 601.05

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Solution

The fourth proportional to 638.31, 875.61 and 601.05 is: 824.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.31 : 875.61 = 601.05 : x
  2. Step 2: Convert to fraction form
    638.31/875.61 = 601.05/x
  3. Step 3: Cross multiply
    638.31x = 875.61 × 601.05
  4. Step 4: Simplify right side
    638.31x = 526,285.39
  5. Step 5: Solve for x
    x = 526,285.39/638.31
  6. Step 6: Final answer
    x = 824.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.