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Finding the Fourth Proportional to 638.15, 955.53 and 584.69

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Solution

The fourth proportional to 638.15, 955.53 and 584.69 is: 875.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.15 : 955.53 = 584.69 : x
  2. Step 2: Convert to fraction form
    638.15/955.53 = 584.69/x
  3. Step 3: Cross multiply
    638.15x = 955.53 × 584.69
  4. Step 4: Simplify right side
    638.15x = 558,684.06
  5. Step 5: Solve for x
    x = 558,684.06/638.15
  6. Step 6: Final answer
    x = 875.48

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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.